comctl32supp.c File Reference

#include "precomp.h"

Include dependency graph for comctl32supp.c:

Go to the source code of this file.

Functions
HRESULT	GetComCtl32Version (OUT PDWORD pdwMajor, OUT PDWORD pdwMinor, OUT PDWORD pdwBuild)

Function Documentation

GetComCtl32Version()

HRESULT GetComCtl32Version	(	OUT PDWORD	pdwMajor,
		OUT PDWORD	pdwMinor,
		OUT PDWORD	pdwBuild
	)

Definition at line 11 of file comctl32supp.c.

{
    HRESULT   hr = S_OK;
    HINSTANCE hDll;
    DLLGETVERSIONPROC pDllGetVersion;
    DLLVERSIONINFO dvi;
 
    *pdwMajor = 0;
    *pdwMinor = 0;
    *pdwBuild = 0;
 
    /*
     * WARNING! DISCLAIMER!
     *
     * This method of retrieving a handle to an already loaded comctl32.dll
     * is known to not be reliable in case the program is using SxS, or if
     * this code is used from inside a DLL.
     */
 
    /*
     * See: https://learn.microsoft.com/en-us/windows/win32/controls/common-control-versions
     * and: http://www.geoffchappell.com/studies/windows/shell/comctl32/history/
     * for the possible version values to be returned.
     */
 
    /* Get a handle to comctl32.dll that must already be loaded */
    hDll = GetModuleHandleW(L"comctl32.dll"); // NOTE: We must not call FreeLibrary on the returned handle!
    if (!hDll) return E_FAIL;
 
    pDllGetVersion = (DLLGETVERSIONPROC)GetProcAddress(hDll, "DllGetVersion");
    if (pDllGetVersion)
    {
        ZeroMemory(&dvi, sizeof(dvi));
        dvi.cbSize = sizeof(dvi);
 
        hr = (*pDllGetVersion)(&dvi);
        if (SUCCEEDED(hr))
        {
            *pdwMajor = dvi.dwMajorVersion;
            *pdwMinor = dvi.dwMinorVersion;
            *pdwBuild = dvi.dwBuildNumber;
 
#if 0
// #include "stringutils.h"
 
            LPWSTR strVersion =
                FormatString(L"ComCtl32 version %d.%d, Build %d, Platform %d",
                             dvi.dwMajorVersion, dvi.dwMinorVersion, dvi.dwBuildNumber, dvi.dwPlatformID);
            MessageBoxW(NULL, strVersion, L"ComCtl32 version", MB_OK);
            MemFree(strVersion);
#endif
        }
    }
    else
    {
        /*
         * If GetProcAddress failed, the DLL is a version
         * previous to the one shipped with IE 3.x.
         */
        *pdwMajor = 4;
        *pdwMinor = 0;
        *pdwBuild = 0;
    }
 
    return hr;
}

Referenced by TreeView_Set3StateCheck().