[DirectShow] How to get the version of DirectX that is installed --- GetDXVersion

DirectX 8.1 shipped with Windows XP. However, VMR-9 requires DirectX 9. Thus, if your application use VMR-9,  you should check the user's DirectX version that is installed. If an older version of DirectX is on the system, your application may need to scale itself to the capabilities of that version or install the most recent version.

Make sure your desired version number, your application will run normally. How to code this function? Please follow the instructions.

Don't worry! It's simple.

Compiler Setting

Step 1 : Copy the source code getdxver.cpp into your project path. You can find the file under your DirectX SDK root folder at Samples\Multimedia\DXMisc\GetDXVer.

Step 2:  Put the getdxver.cpp in your project.

Step 3: Add two libraries Version.lib dxguid.lib in the linking setting.

How to use ?

      ----------------------------------  code -----------------------------

// 宣告 GetDXVersion method, 取得 DirectX 安裝版本

extern HRESULT GetDXVersion( DWORD* pdwDirectXVersion,

                                                                    TCHAR* strDirectXVersion,

                                                                    int cchDirectXVersion );

 

// 取得使用者安裝的 DirectX 版本 (關鍵片段)
    DWORD dwDirectXVersion; // 回傳的版本號碼: 參考附錄
    TCHAR strDirectXVersion[10]; // 回傳的版本字串
    HRESULT hr =GetDXVersion(&dwDirectXVersion, strDirectXVersion,

                                                                     10);
// 後面是顯示的部分  

TCHAR strResult[128];
    if( SUCCEEDED(hr) )    {
        if( dwDirectXVersion > 0 )
            StringCchPrintf( strResult, 128, TEXT("DirectX %s installed"),

                                              strDirectXVersion );
        else
            StringCchCopy( strResult, 128, TEXT("DirectX not installed") );
    }
    else    {
        StringCchPrintf( strResult, 128, TEXT("Unknown version

                                                                         of DirectX installed") );
    }
    MessageBox( NULL, strResult, TEXT("DirectX Version:"),

                                  MB_OK | MB_ICONINFORMATION );

---------------------------------- end of code -----------------------------

附錄:

//              0x00000000 = No DirectX installed
//              0x00010000 = DirectX 1.0 installed
//              0x00020000 = DirectX 2.0 installed
//              0x00030000 = DirectX 3.0 installed
//              0x00030001 = DirectX 3.0a installed
//              0x00050000 = DirectX 5.0 installed
//              0x00060000 = DirectX 6.0 installed
//              0x00060100 = DirectX 6.1 installed
//              0x00060101 = DirectX 6.1a installed
//              0x00070000 = DirectX 7.0 installed
//              0x00070001 = DirectX 7.0a installed
//              0x00080000 = DirectX 8.0 installed
//              0x00080100 = DirectX 8.1 installed
//              0x00080101 = DirectX 8.1a installed
//              0x00080102 = DirectX 8.1b installed
//              0x00080200 = DirectX 8.2 installed
//              0x00090000 = DirectX 9.0 installed

 

 

by Jing.

 

Reference

[1] http://msdn.microsoft.com/archive/en-us/directx9_c_Summer_04/directx/directxsdk/tools/versioncheck.asp?frame=true