修改窗体透明度的方法

在OnInitDialog()增加:

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(),0,128,2);   //透明度(0~255)
 FreeLibrary(hInst);