1、在构造函数中：
//背景透明
/* SetWindowLong(this-> GetSafeHwnd(),GWL_EXSTYLE,GetWindowLong(this-> GetSafeHwnd(),GWL_EXSTYLE)^0x80000);
HINSTANCE hInst = LoadLibrary( "User32.DLL ");
if(hInst)
{
typedef BOOL (WINAPI *MYFUNC)(HWND,COLORREF,BYTE,DWORD);
MYFUNC fun = NULL;
//取得SetLayeredWindowAttributes函数指针
fun=(MYFUNC)GetProcAddress(hInst, "SetLayeredWindowAttributes ");
if(fun)fun(this-> GetSafeHwnd(),0,222,2); //128
FreeLibrary(hInst);
}
*/