dll/win32/comctl32/taskdialog.c

   1 /*
   2  * Task dialog control
   3  *
   4  * Copyright 2017 Fabian Maurer
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  *
  20  */
  21
  22 #include <stdarg.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25
  26 #define NONAMELESSUNION
  27
  28 #include "windef.h"
  29 #include "winbase.h"
  30 #include "wingdi.h"
  31 #include "winuser.h"
  32 #include "commctrl.h"
  33 #include "winerror.h"
  34 #include "comctl32.h"
  35
  36 #include "wine/debug.h"
  37 #include "wine/list.h"
  38 #include "wine/unicode.h"
  39
  40 WINE_DEFAULT_DEBUG_CHANNEL(taskdialog);
  41
  42 #define ALIGNED_LENGTH(_Len, _Align) (((_Len)+(_Align))&~(_Align))
  43 #define ALIGNED_POINTER(_Ptr, _Align) ((LPVOID)ALIGNED_LENGTH((ULONG_PTR)(_Ptr), _Align))
  44 #define ALIGN_LENGTH(_Len, _Align) _Len = ALIGNED_LENGTH(_Len, _Align)
  45 #define ALIGN_POINTER(_Ptr, _Align) _Ptr = ALIGNED_POINTER(_Ptr, _Align)
  46
  47 static const UINT DIALOG_MIN_WIDTH = 240;
  48 static const UINT DIALOG_SPACING = 5;
  49 static const UINT DIALOG_BUTTON_WIDTH = 50;
  50 static const UINT DIALOG_BUTTON_HEIGHT = 14;
  51
  52 static const UINT ID_MAIN_INSTRUCTION = 0xf000;
  53 static const UINT ID_CONTENT          = 0xf001;
  54
  55 struct taskdialog_control
  56 {
  57     struct list entry;
  58     DLGITEMTEMPLATE *template;
  59     unsigned int template_size;
  60 };
  61
  62 struct taskdialog_button_desc
  63 {
  64     int id;
  65     const WCHAR *text;
  66     unsigned int width;
  67     unsigned int line;
  68     HINSTANCE hinst;
  69 };
  70
  71 struct taskdialog_template_desc
  72 {
  73     const TASKDIALOGCONFIG *taskconfig;
  74     unsigned int dialog_height;
  75     unsigned int dialog_width;
  76     struct list controls;
  77     WORD control_count;
  78     LONG x_baseunit;
  79     LONG y_baseunit;
  80     HFONT font;
  81     struct taskdialog_button_desc *default_button;
  82 };
  83
  84 struct taskdialog_info
  85 {
  86     HWND hwnd;
  87     PFTASKDIALOGCALLBACK callback;
  88     LONG_PTR callback_data;
  89 };
  90
  91 static void pixels_to_dialogunits(const struct taskdialog_template_desc *desc, LONG *width, LONG *height)
  92 {
  93     if (width)
  94         *width = MulDiv(*width, 4, desc->x_baseunit);
  95     if (height)
  96         *height = MulDiv(*height, 8, desc->y_baseunit);
  97 }
  98
  99 static void dialogunits_to_pixels(const struct taskdialog_template_desc *desc, LONG *width, LONG *height)
 100 {
 101     if (width)
 102         *width = MulDiv(*width, desc->x_baseunit, 4);
 103     if (height)
 104         *height = MulDiv(*height, desc->y_baseunit, 8);
 105 }
 106
 107 static void template_write_data(char **ptr, const void *src, unsigned int size)
 108 {
 109     memcpy(*ptr, src, size);
 110     *ptr += size;
 111 }
 112
 113 /* used to calculate size for the controls */
 114 static void taskdialog_get_text_extent(const struct taskdialog_template_desc *desc, const WCHAR *text,
 115         BOOL user_resource, SIZE *sz)
 116 {
 117     RECT rect = { 0, 0, desc->dialog_width - DIALOG_SPACING * 2, 0}; /* padding left and right of the control */
 118     const WCHAR *textW = NULL;
 119     static const WCHAR nulW;
 120     unsigned int length;
 121     HFONT oldfont;
 122     HDC hdc;
 123
 124     if (IS_INTRESOURCE(text))
 125     {
 126         if (!(length = LoadStringW(user_resource ? desc->taskconfig->hInstance : COMCTL32_hModule,
 127                 (UINT_PTR)text, (WCHAR *)&textW, 0)))
 128         {
 129             WARN("Failed to load text\n");
 130             textW = &nulW;
 131             length = 0;
 132         }
 133     }
 134     else
 135     {
 136         textW = text;
 137         length = strlenW(textW);
 138     }
 139
 140     hdc = GetDC(0);
 141     oldfont = SelectObject(hdc, desc->font);
 142
 143     dialogunits_to_pixels(desc, &rect.right, NULL);
 144     DrawTextW(hdc, textW, length, &rect, DT_LEFT | DT_EXPANDTABS | DT_CALCRECT | DT_WORDBREAK);
 145     pixels_to_dialogunits(desc, &rect.right, &rect.bottom);
 146
 147     SelectObject(hdc, oldfont);
 148     ReleaseDC(0, hdc);
 149
 150     sz->cx = rect.right - rect.left;
 151     sz->cy = rect.bottom - rect.top;
 152 }
 153
 154 static unsigned int taskdialog_add_control(struct taskdialog_template_desc *desc, WORD id, const WCHAR *class,
 155         HINSTANCE hInstance, const WCHAR *text, DWORD style, short x, short y, short cx, short cy)
 156 {
 157     struct taskdialog_control *control = Alloc(sizeof(*control));
 158     unsigned int size, class_size, text_size;
 159     DLGITEMTEMPLATE *template;
 160     static const WCHAR nulW;
 161     const WCHAR *textW;
 162     char *ptr;
 163
 164     class_size = (strlenW(class) + 1) * sizeof(WCHAR);
 165
 166     if (IS_INTRESOURCE(text))
 167         text_size = LoadStringW(hInstance, (UINT_PTR)text, (WCHAR *)&textW, 0) * sizeof(WCHAR);
 168     else
 169     {
 170         textW = text;
 171         text_size = strlenW(textW) * sizeof(WCHAR);
 172     }
 173
 174     size = sizeof(DLGITEMTEMPLATE);
 175     size += class_size;
 176     size += text_size + sizeof(WCHAR);
 177     size += sizeof(WORD); /* creation data */
 178
 179     control->template = template = Alloc(size);
 180     control->template_size = size;
 181
 182     template->style = WS_VISIBLE | style;
 183     template->dwExtendedStyle = 0;
 184     template->x = x;
 185     template->y = y;
 186     template->cx = cx;
 187     template->cy = cy;
 188     template->id = id;
 189     ptr = (char *)(template + 1);
 190     template_write_data(&ptr, class, class_size);
 191     template_write_data(&ptr, textW, text_size);
 192     template_write_data(&ptr, &nulW, sizeof(nulW));
 193
 194     list_add_tail(&desc->controls, &control->entry);
 195     desc->control_count++;
 196     return ALIGNED_LENGTH(size, 3);
 197 }
 198
 199 static unsigned int taskdialog_add_static_label(struct taskdialog_template_desc *desc, WORD id, const WCHAR *str)
 200 {
 201     unsigned int size;
 202     SIZE sz;
 203
 204     if (!str)
 205         return 0;
 206
 207     taskdialog_get_text_extent(desc, str, TRUE, &sz);
 208
 209     desc->dialog_height += DIALOG_SPACING;
 210     size = taskdialog_add_control(desc, id, WC_STATICW, desc->taskconfig->hInstance, str, 0, DIALOG_SPACING,
 211             desc->dialog_height, sz.cx, sz.cy);
 212     desc->dialog_height += sz.cy + DIALOG_SPACING;
 213     return size;
 214 }
 215
 216 static unsigned int taskdialog_add_main_instruction(struct taskdialog_template_desc *desc)
 217 {
 218     return taskdialog_add_static_label(desc, ID_MAIN_INSTRUCTION, desc->taskconfig->pszMainInstruction);
 219 }
 220
 221 static unsigned int taskdialog_add_content(struct taskdialog_template_desc *desc)
 222 {
 223     return taskdialog_add_static_label(desc, ID_CONTENT, desc->taskconfig->pszContent);
 224 }
 225
 226 static void taskdialog_init_button(struct taskdialog_button_desc *button, struct taskdialog_template_desc *desc,
 227         int id, const WCHAR *text, BOOL custom_button)
 228 {
 229     SIZE sz;
 230
 231     taskdialog_get_text_extent(desc, text, custom_button, &sz);
 232
 233     button->id = id;
 234     button->text = text;
 235     button->width = max(DIALOG_BUTTON_WIDTH, sz.cx + DIALOG_SPACING * 2);
 236     button->line = 0;
 237     button->hinst = custom_button ? desc->taskconfig->hInstance : COMCTL32_hModule;
 238
 239     if (id == desc->taskconfig->nDefaultButton)
 240         desc->default_button = button;
 241 }
 242
 243 static void taskdialog_init_common_buttons(struct taskdialog_template_desc *desc, struct taskdialog_button_desc *buttons,
 244     unsigned int *button_count)
 245 {
 246     DWORD flags = desc->taskconfig->dwCommonButtons;
 247
 248 #define TASKDIALOG_INIT_COMMON_BUTTON(id) \
 249     do { \
 250         taskdialog_init_button(&buttons[(*button_count)++], desc, ID##id, MAKEINTRESOURCEW(IDS_BUTTON_##id), FALSE); \
 251     } while(0)
 252
 253     if (flags & TDCBF_OK_BUTTON)
 254         TASKDIALOG_INIT_COMMON_BUTTON(OK);
 255     if (flags & TDCBF_YES_BUTTON)
 256         TASKDIALOG_INIT_COMMON_BUTTON(YES);
 257     if (flags & TDCBF_NO_BUTTON)
 258         TASKDIALOG_INIT_COMMON_BUTTON(NO);
 259     if (flags & TDCBF_RETRY_BUTTON)
 260         TASKDIALOG_INIT_COMMON_BUTTON(RETRY);
 261     if (flags & TDCBF_CANCEL_BUTTON)
 262         TASKDIALOG_INIT_COMMON_BUTTON(CANCEL);
 263     if (flags & TDCBF_CLOSE_BUTTON)
 264         TASKDIALOG_INIT_COMMON_BUTTON(CLOSE);
 265
 266 #undef TASKDIALOG_INIT_COMMON_BUTTON
 267 }
 268
 269 static unsigned int taskdialog_add_buttons(struct taskdialog_template_desc *desc)
 270 {
 271     unsigned int count = 0, buttons_size, i, line_count, size = 0;
 272     unsigned int location_x, *line_widths, alignment = ~0u;
 273     const TASKDIALOGCONFIG *taskconfig = desc->taskconfig;
 274     struct taskdialog_button_desc *buttons;
 275
 276     /* Allocate enough memory for the custom and the default buttons. Maximum 6 default buttons possible. */
 277     buttons_size = 6;
 278     if (taskconfig->cButtons && taskconfig->pButtons)
 279         buttons_size += taskconfig->cButtons;
 280
 281     if (!(buttons = Alloc(buttons_size * sizeof(*buttons))))
 282         return 0;
 283
 284     /* Custom buttons */
 285     if (taskconfig->cButtons && taskconfig->pButtons)
 286         for (i = 0; i < taskconfig->cButtons; i++)
 287             taskdialog_init_button(&buttons[count++], desc, taskconfig->pButtons[i].nButtonID,
 288                     taskconfig->pButtons[i].pszButtonText, TRUE);
 289
 290     /* Common buttons */
 291     taskdialog_init_common_buttons(desc, buttons, &count);
 292
 293     /* There must be at least one button */
 294     if (count == 0)
 295         taskdialog_init_button(&buttons[count++], desc, IDOK, MAKEINTRESOURCEW(IDS_BUTTON_OK), FALSE);
 296
 297     if (!desc->default_button)
 298         desc->default_button = &buttons[0];
 299
 300     /* For easy handling just allocate as many lines as buttons, the worst case. */
 301     line_widths = Alloc(count * sizeof(*line_widths));
 302
 303     /* Separate buttons into lines */
 304     location_x = DIALOG_SPACING;
 305     for (i = 0, line_count = 0; i < count; i++)
 306     {
 307         if (location_x + buttons[i].width + DIALOG_SPACING > desc->dialog_width)
 308         {
 309             location_x = DIALOG_SPACING;
 310             line_count++;
 311         }
 312
 313         buttons[i].line = line_count;
 314
 315         location_x += buttons[i].width + DIALOG_SPACING;
 316         line_widths[line_count] += buttons[i].width + DIALOG_SPACING;
 317     }
 318     line_count++;
 319
 320     /* Try to balance lines so they are about the same size */
 321     for (i = 1; i < line_count - 1; i++)
 322     {
 323         int diff_now = abs(line_widths[i] - line_widths[i - 1]);
 324         unsigned int j, last_button = 0;
 325         int diff_changed;
 326
 327         for (j = 0; j < count; j++)
 328             if (buttons[j].line == i - 1)
 329                 last_button = j;
 330
 331         /* Difference in length of both lines if we wrapped the last button from the last line into this one */
 332         diff_changed = abs(2 * buttons[last_button].width + line_widths[i] - line_widths[i - 1]);
 333
 334         if (diff_changed < diff_now)
 335         {
 336             buttons[last_button].line = i;
 337             line_widths[i] += buttons[last_button].width;
 338             line_widths[i - 1] -= buttons[last_button].width;
 339         }
 340     }
 341
 342     /* Calculate left alignment so all lines are as far right as possible. */
 343     for (i = 0; i < line_count; i++)
 344     {
 345         int new_alignment = desc->dialog_width - line_widths[i];
 346         if (new_alignment < alignment)
 347             alignment = new_alignment;
 348     }
 349
 350     /* Now that we got them all positioned, create all buttons */
 351     location_x = alignment;
 352     for (i = 0; i < count; i++)
 353     {
 354         DWORD style = &buttons[i] == desc->default_button ? BS_DEFPUSHBUTTON : BS_PUSHBUTTON;
 355
 356         if (i > 0 && buttons[i].line != buttons[i - 1].line) /* New line */
 357         {
 358             location_x = alignment;
 359             desc->dialog_height += DIALOG_BUTTON_HEIGHT + DIALOG_SPACING;
 360         }
 361
 362         size += taskdialog_add_control(desc, buttons[i].id, WC_BUTTONW, buttons[i].hinst, buttons[i].text, style,
 363                 location_x, desc->dialog_height, buttons[i].width, DIALOG_BUTTON_HEIGHT);
 364
 365         location_x += buttons[i].width + DIALOG_SPACING;
 366     }
 367
 368     /* Add height for last row and spacing */
 369     desc->dialog_height += DIALOG_BUTTON_HEIGHT + DIALOG_SPACING;
 370
 371     Free(line_widths);
 372     Free(buttons);
 373
 374     return size;
 375 }
 376
 377 static void taskdialog_clear_controls(struct list *controls)
 378 {
 379     struct taskdialog_control *control, *control2;
 380
 381     LIST_FOR_EACH_ENTRY_SAFE(control, control2, controls, struct taskdialog_control, entry)
 382     {
 383         list_remove(&control->entry);
 384         Free(control->template);
 385         Free(control);
 386     }
 387 }
 388
 389 static unsigned int taskdialog_get_reference_rect(const struct taskdialog_template_desc *desc, RECT *ret)
 390 {
 391     HMONITOR monitor = MonitorFromWindow(desc->taskconfig->hwndParent ? desc->taskconfig->hwndParent : GetActiveWindow(),
 392             MONITOR_DEFAULTTOPRIMARY);
 393     MONITORINFO info;
 394
 395     info.cbSize = sizeof(info);
 396     GetMonitorInfoW(monitor, &info);
 397
 398     if (desc->taskconfig->dwFlags & TDF_POSITION_RELATIVE_TO_WINDOW && desc->taskconfig->hwndParent)
 399         GetWindowRect(desc->taskconfig->hwndParent, ret);
 400     else
 401         *ret = info.rcWork;
 402
 403     pixels_to_dialogunits(desc, &ret->left, &ret->top);
 404     pixels_to_dialogunits(desc, &ret->right, &ret->bottom);
 405
 406     pixels_to_dialogunits(desc, &info.rcWork.left, &info.rcWork.top);
 407     pixels_to_dialogunits(desc, &info.rcWork.right, &info.rcWork.bottom);
 408     return info.rcWork.right - info.rcWork.left;
 409 }
 410
 411 static WCHAR *taskdialog_get_exe_name(const TASKDIALOGCONFIG *taskconfig, WCHAR *name, DWORD length)
 412 {
 413     DWORD len = GetModuleFileNameW(NULL, name, length);
 414     if (len && len < length)
 415     {
 416         WCHAR *p;
 417         if ((p = strrchrW(name, '/'))) name = p + 1;
 418         if ((p = strrchrW(name, '\\'))) name = p + 1;
 419         return name;
 420     }
 421     else
 422         return NULL;
 423 }
 424
 425 static DLGTEMPLATE *create_taskdialog_template(const TASKDIALOGCONFIG *taskconfig)
 426 {
 427     struct taskdialog_control *control, *control2;
 428     unsigned int size, title_size, screen_width;
 429     struct taskdialog_template_desc desc;
 430     static const WORD fontsize = 0x7fff;
 431     static const WCHAR emptyW[] = { 0 };
 432     const WCHAR *titleW = NULL;
 433     DLGTEMPLATE *template;
 434     NONCLIENTMETRICSW ncm;
 435     WCHAR pathW[MAX_PATH];
 436     RECT ref_rect;
 437     char *ptr;
 438     HDC hdc;
 439
 440     /* Window title */
 441     if (!taskconfig->pszWindowTitle)
 442         titleW = taskdialog_get_exe_name(taskconfig, pathW, ARRAY_SIZE(pathW));
 443     else if (IS_INTRESOURCE(taskconfig->pszWindowTitle))
 444     {
 445         if (!LoadStringW(taskconfig->hInstance, LOWORD(taskconfig->pszWindowTitle), (WCHAR *)&titleW, 0))
 446             titleW = taskdialog_get_exe_name(taskconfig, pathW, ARRAY_SIZE(pathW));
 447     }
 448     else
 449         titleW = taskconfig->pszWindowTitle;
 450     if (!titleW)
 451         titleW = emptyW;
 452     title_size = (strlenW(titleW) + 1) * sizeof(WCHAR);
 453
 454     size = sizeof(DLGTEMPLATE) + 2 * sizeof(WORD);
 455     size += title_size;
 456     size += 2; /* font size */
 457
 458     list_init(&desc.controls);
 459     desc.taskconfig = taskconfig;
 460     desc.control_count = 0;
 461
 462     ncm.cbSize = sizeof(ncm);
 463     SystemParametersInfoW(SPI_GETNONCLIENTMETRICS, ncm.cbSize, &ncm, 0);
 464     desc.font = CreateFontIndirectW(&ncm.lfMessageFont);
 465
 466     hdc = GetDC(0);
 467     SelectObject(hdc, desc.font);
 468     desc.x_baseunit = GdiGetCharDimensions(hdc, NULL, &desc.y_baseunit);
 469     ReleaseDC(0, hdc);
 470
 471     screen_width = taskdialog_get_reference_rect(&desc, &ref_rect);
 472
 473     desc.dialog_height = 0;
 474     desc.dialog_width = max(taskconfig->cxWidth, DIALOG_MIN_WIDTH);
 475     desc.dialog_width = min(desc.dialog_width, screen_width);
 476     desc.default_button = NULL;
 477
 478     size += taskdialog_add_main_instruction(&desc);
 479     size += taskdialog_add_content(&desc);
 480     size += taskdialog_add_buttons(&desc);
 481
 482     template = Alloc(size);
 483     if (!template)
 484     {
 485         taskdialog_clear_controls(&desc.controls);
 486         DeleteObject(desc.font);
 487         return NULL;
 488     }
 489
 490     template->style = DS_MODALFRAME | DS_SETFONT | WS_CAPTION | WS_VISIBLE | WS_SYSMENU;
 491     template->cdit = desc.control_count;
 492     template->x = (ref_rect.left + ref_rect.right + desc.dialog_width) / 2;
 493     template->y = (ref_rect.top + ref_rect.bottom + desc.dialog_height) / 2;
 494     template->cx = desc.dialog_width;
 495     template->cy = desc.dialog_height;
 496
 497     ptr = (char *)(template + 1);
 498     ptr += 2; /* menu */
 499     ptr += 2; /* class */
 500     template_write_data(&ptr, titleW, title_size);
 501     template_write_data(&ptr, &fontsize, sizeof(fontsize));
 502
 503     /* write control entries */
 504     LIST_FOR_EACH_ENTRY_SAFE(control, control2, &desc.controls, struct taskdialog_control, entry)
 505     {
 506         ALIGN_POINTER(ptr, 3);
 507
 508         template_write_data(&ptr, control->template, control->template_size);
 509
 510         /* list item won't be needed later */
 511         list_remove(&control->entry);
 512         Free(control->template);
 513         Free(control);
 514     }
 515
 516     DeleteObject(desc.font);
 517     return template;
 518 }
 519
 520 static HRESULT taskdialog_notify(struct taskdialog_info *dialog_info, UINT notification, WPARAM wparam, LPARAM lparam)
 521 {
 522     return dialog_info->callback ? dialog_info->callback(dialog_info->hwnd, notification, wparam, lparam,
 523             dialog_info->callback_data) : S_OK;
 524 }
 525
 526 static void taskdialog_on_button_click(struct taskdialog_info *dialog_info, WORD command_id)
 527 {
 528     if (taskdialog_notify(dialog_info, TDN_BUTTON_CLICKED, command_id, 0) == S_OK)
 529         EndDialog(dialog_info->hwnd, command_id);
 530 }
 531
 532 static INT_PTR CALLBACK taskdialog_proc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
 533 {
 534     static const WCHAR taskdialog_info_propnameW[] = {'T','a','s','k','D','i','a','l','o','g','I','n','f','o',0};
 535     struct taskdialog_info *dialog_info;
 536
 537     TRACE("hwnd=%p msg=0x%04x wparam=%lx lparam=%lx\n", hwnd, msg, wParam, lParam);
 538
 539     if (msg != WM_INITDIALOG)
 540         dialog_info = GetPropW(hwnd, taskdialog_info_propnameW);
 541
 542     switch (msg)
 543     {
 544         case TDM_CLICK_BUTTON:
 545             taskdialog_on_button_click(dialog_info, LOWORD(wParam));
 546             break;
 547         case WM_INITDIALOG:
 548             dialog_info = (struct taskdialog_info *)lParam;
 549             dialog_info->hwnd = hwnd;
 550             SetPropW(hwnd, taskdialog_info_propnameW, dialog_info);
 551
 552             taskdialog_notify(dialog_info, TDN_DIALOG_CONSTRUCTED, 0, 0);
 553             break;
 554         case WM_SHOWWINDOW:
 555             taskdialog_notify(dialog_info, TDN_CREATED, 0, 0);
 556             break;
 557         case WM_COMMAND:
 558             if (HIWORD(wParam) == BN_CLICKED)
 559             {
 560                 taskdialog_on_button_click(dialog_info, LOWORD(wParam));
 561                 return TRUE;
 562             }
 563             break;
 564         case WM_DESTROY:
 565             taskdialog_notify(dialog_info, TDN_DESTROYED, 0, 0);
 566             RemovePropW(hwnd, taskdialog_info_propnameW);
 567             break;
 568     }
 569     return FALSE;
 570 }
 571
 572 /***********************************************************************
 573  * TaskDialogIndirect [COMCTL32.@]
 574  */
 575 HRESULT WINAPI TaskDialogIndirect(const TASKDIALOGCONFIG *taskconfig, int *button,
 576                                   int *radio_button, BOOL *verification_flag_checked)
 577 {
 578     struct taskdialog_info dialog_info;
 579     DLGTEMPLATE *template;
 580     INT ret;
 581
 582     TRACE("%p, %p, %p, %p\n", taskconfig, button, radio_button, verification_flag_checked);
 583
 584     if (!taskconfig || taskconfig->cbSize != sizeof(TASKDIALOGCONFIG))
 585         return E_INVALIDARG;
 586
 587     dialog_info.callback = taskconfig->pfCallback;
 588     dialog_info.callback_data = taskconfig->lpCallbackData;
 589
 590     template = create_taskdialog_template(taskconfig);
 591     ret = (short)DialogBoxIndirectParamW(taskconfig->hInstance, template, taskconfig->hwndParent,
 592             taskdialog_proc, (LPARAM)&dialog_info);
 593     Free(template);
 594
 595     if (button) *button = ret;
 596     if (radio_button) *radio_button = taskconfig->nDefaultButton;
 597     if (verification_flag_checked) *verification_flag_checked = TRUE;
 598
 599     return S_OK;
 600 }
 601
 602 /***********************************************************************
 603  * TaskDialog [COMCTL32.@]
 604  */
 605 HRESULT WINAPI TaskDialog(HWND owner, HINSTANCE hinst, const WCHAR *title, const WCHAR *main_instruction,
 606     const WCHAR *content, TASKDIALOG_COMMON_BUTTON_FLAGS common_buttons, const WCHAR *icon, int *button)
 607 {
 608     TASKDIALOGCONFIG taskconfig;
 609
 610     TRACE("%p, %p, %s, %s, %s, %#x, %s, %p\n", owner, hinst, debugstr_w(title), debugstr_w(main_instruction),
 611         debugstr_w(content), common_buttons, debugstr_w(icon), button);
 612
 613     memset(&taskconfig, 0, sizeof(taskconfig));
 614     taskconfig.cbSize = sizeof(taskconfig);
 615     taskconfig.hwndParent = owner;
 616     taskconfig.hInstance = hinst;
 617     taskconfig.dwCommonButtons = common_buttons;
 618     taskconfig.pszWindowTitle = title;
 619     taskconfig.u.pszMainIcon = icon;
 620     taskconfig.pszMainInstruction = main_instruction;
 621     taskconfig.pszContent = content;
 622     return TaskDialogIndirect(&taskconfig, button, NULL, NULL);
 623 }