VC透明窗口实现

    SetWindowLong(m_hWnd,GWL_EXSTYLE,GetWindowLong(m_hWnd,GWL_EXSTYLE)^WS_EX_LAYERED);
    HINSTANCE hInst = GetModuleHandle(_T("User32.DLL"));
    if(hInst)  
    {  
        typedef BOOL (WINAPI *TestFun)(HWND,COLORREF,BYTE,DWORD);   
        //取得SetLayeredWindowAttributes函数指针
        TestFun mytest = (TestFun)GetProcAddress(hInst, "SetLayeredWindowAttributes");  
        if(mytest)
            mytest(m_hWnd,0,200,LWA_ALPHA);
    }