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...draw a color outline around TForm?
Autor: Unknown
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Tip Rating (12):  
     


{
  Erstelle ein Message Handler für die Windows Message WM_NCPAINT Message. Das
  folgende Beispiel zeichnet ein 1 Pixel breiter roter Rahmen um
  das Formular.

  Create a message handler for the Windows Message WM_NCPAINT
  message. The following example paints a 1 pixel red border around the
  frame of the form.
}

unit Unit1;

interface

uses
  
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs;

type
  
TForm1 = class(TForm)
  private
    
{ Private-Deklarationen }
    
procedure WMNCPaint(var Msg: TWMNCPaint); message WM_NCPAINT;
  public
    
{ Public-Deklarationen }
  
end;

var
  
Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.WMNCPaint(var Msg: TWMNCPaint);
var
  
dc: hDc;
  Pen: hPen;
  OldPen: hPen;
  OldBrush: hBrush;
begin
  inherited
;
  dc := GetWindowDC(Handle);
  Msg.Result := 1;
  //Change the RGB value to change the color
  
Pen := CreatePen(PS_SOLID, 1, RGB(255, 0, 0));
  OldPen := SelectObject(dc, Pen);
  OldBrush := SelectObject(dc, GetStockObject(NULL_BRUSH));
  Rectangle(dc, 0, 0, Form1.Width, Form1.Height);
  SelectObject(dc, OldBrush);
  SelectObject(dc, OldPen);
  DeleteObject(Pen);
  ReleaseDC(Handle, Canvas.Handle);
end;


end.


 

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