重载CreateParams实现无标题栏的窗体

重载TForm类的CreateParams(TCreateParams& Params)方法。

void __fastcall CreateParams(TCreateParams& Params)

{

Params.Style&=WS_CAPTION;

TForm::CreateParams(Params);

}

截取Windows的WM_NCHITTEST消息

在头文件中加入

private:

void __fastcall WMNChitTest(TMessage& Msg);

protected:

BEGIN_MESSAGE_MAP

VCL_MESSAGE_HANDLER(WM_NCHITTEST,TMessage,WMNChitTest)

END_MESSAGE_MAP(TForm)

在主文件中加入

void __fastcall WMNChitTest(TMessage& Msg)

{

if(GetAsyncKeyState(VK_LBUTTON)<0)

Msg.Result=HTCAPTION;

else

Msg.Result=HTCLIENT;

}