reactos/base/applications/msconfig_new/comctl32ex/comctl32supp.c

   1 /*
   2  * PROJECT:     ReactOS Applications
   3  * LICENSE:     LGPL - See COPYING in the top level directory
   4  * FILE:        base/applications/msconfig_new/comctl32ex/comctl32supp.c
   5  * PURPOSE:     Common Controls helper functions.
   6  * COPYRIGHT:   Copyright 2011-2012 Hermes BELUSCA - MAITO <hermes.belusca@sfr.fr>
   7  */
   8
   9 #include "precomp.h"
  10
  11 HRESULT GetComCtl32Version(OUT PDWORD pdwMajor, OUT PDWORD pdwMinor, OUT PDWORD pdwBuild)
  12 {
  13     HRESULT   hr = S_OK;
  14     HINSTANCE hDll;
  15     DLLGETVERSIONPROC pDllGetVersion;
  16     DLLVERSIONINFO dvi;
  17
  18     *pdwMajor = 0;
  19     *pdwMinor = 0;
  20     *pdwBuild = 0;
  21
  22     /*
  23      * WARNING! DISCLAIMER!
  24      *
  25      * This method of retrieving a handle to an already loaded comctl32.dll
  26      * is known to not be reliable in case the program is using SxS, or if
  27      * this code is used from inside a DLL.
  28      */
  29
  30     /*
  31      * See: https://msdn.microsoft.com/en-us/library/windows/desktop/hh298349(v=vs.85).aspx
  32      * and: http://www.geoffchappell.com/studies/windows/shell/comctl32/history/
  33      * for the possible version values to be returned.
  34      */
  35
  36     /* Get a handle to comctl32.dll that must already be loaded */
  37     hDll = GetModuleHandleW(L"comctl32.dll"); // NOTE: We must not call FreeLibrary on the returned handle!
  38     if (!hDll) return E_FAIL;
  39
  40     pDllGetVersion = (DLLGETVERSIONPROC)GetProcAddress(hDll, "DllGetVersion");
  41     if (pDllGetVersion)
  42     {
  43         ZeroMemory(&dvi, sizeof(dvi));
  44         dvi.cbSize = sizeof(dvi);
  45
  46         hr = (*pDllGetVersion)(&dvi);
  47         if (SUCCEEDED(hr))
  48         {
  49             *pdwMajor = dvi.dwMajorVersion;
  50             *pdwMinor = dvi.dwMinorVersion;
  51             *pdwBuild = dvi.dwBuildNumber;
  52
  53 #if 0
  54 // #include "stringutils.h"
  55
  56             LPWSTR strVersion =
  57                 FormatString(L"ComCtl32 version %d.%d, Build %d, Platform %d",
  58                              dvi.dwMajorVersion, dvi.dwMinorVersion, dvi.dwBuildNumber, dvi.dwPlatformID);
  59             MessageBoxW(NULL, strVersion, L"ComCtl32 version", MB_OK);
  60             MemFree(strVersion);
  61 #endif
  62         }
  63     }
  64     else
  65     {
  66         /*
  67          * If GetProcAddress failed, the DLL is a version
  68          * previous to the one shipped with IE 3.x.
  69          */
  70         *pdwMajor = 4;
  71         *pdwMinor = 0;
  72         *pdwBuild = 0;
  73     }
  74
  75     return hr;
  76 }