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首頁 > 編程 > Java > 正文

制作透明窗體

2019-09-06 23:33:16

字體：大中小

來源：轉載

供稿：網友

1.重載CreateParams函數，設置透明風格
2.然后重載它的WM_ERASEBKGND消息。
代碼片段：

.h File
class TYourForm:public TForm
{
private:
/tvoid __fastcall WMNC(TMessage &Message);
public:
/t__fastcall TYourForm(TComponent *Owner);
/tBEGIN_MESSAGE_MAP
/t VCL_MESSAGE_HANDLER(WM_ERASEBKGND,TMessage,WMNC);
/tEND_MESSAGE_MAP(TForm);
protected:
/tvirtual 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;
}

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