<b>制作透明窗体</b>[VC/C++编程]

1.重载CreateParams函数,设置透明气势

2.然后重载它的WM_ERASEBKGND消息.

代码片段:

.h File
class TYourForm:public TForm
{
private:
　　　　 void __fastcall WMNC(TMessage &Message);
public:
　　　　 __fastcall TYourForm(TComponent *Owner);
　　　　 BEGIN_MESSAGE_MAP
　　　　　 VCL_MESSAGE_HANDLER(WM_ERASEBKGND,TMessage,WMNC);
　　　　 END_MESSAGE_MAP(TForm);
protected:
　　　　 virtual void __fastcall CreateParams(TCreateParams &Params);
}
.cpp File
void __fastcall TYourForm::CreateParams(TCreateParams &Params)
{
　 TForm::CreateParams(Params);
　 Params.EX_STYLE|=WS_EX_TRANSPARENT;
}
void __fastcall TYourForm::WMNC(TMessage &Message)
{
　 SetBkMode(GetWindowDC(this->Handle),OPAQUE);
　 ReleaseDC(this->Handle,GetWindowDC(this->Handle)) ;
　 Messgae.Result=1;
}