Fenstergröße an eigenem Rahmen ändern...

[SirThornberry]

vor einiger zeit hab ich die frage auch mal gestellt und hab folgendes erhalten:

Delphi-Quellcode:

procedure WMNCHitTest(var Msg: TWMNCHitTest); message WM_NCHITTEST;

[...]

procedure TSBMainForm.WMNCHitTest(var Msg: TWMNCHitTest);
begin
  DefaultHandler(Msg);
  with Msg do
        // TOP
    if PtInRect(Rect(0, 0, Width, 4), Point((XPos - Left), (YPos - Top))) then
      RESULT := htTop
        // LEFT
    else if PtInRect(Rect(0, 0, 4, Height), Point((XPos - Left), (YPos - Top))) then
      RESULT := htLeft
        // BOTTOM
    else if PtInRect(Rect(0, Height - 4, Width, Height), Point((XPos - Left), (YPos - Top))) then
      RESULT := htBottom
        // RIGHT
    else if PtInRect(Rect((Width - 4), 0, Width, Height), Point((XPos - Left), (YPos - Top))) then
      RESULT := htRight
        // TOPLEFT
    else if PtInRect(Rect(0, 0, 4, 4), Point((XPos - Left), (YPos - Top))) then
      RESULT := htTopLeft
        // TOPRIGHT
    else if PtInRect(Rect((Width - 4), 0, Width, 4), Point((XPos - Left), (YPos - Top))) then
      RESULT := htTopRight
        //BOTTOMLEFT
    else if PtInRect(Rect(0, (Height - 4), 4, Height), Point((XPos - Left), (YPos - Top))) then
      RESULT := htBottomLeft
        // BOTTOMRIGHT
    else if PtInRect(Rect((Width - 4), (Height - 4), Width, Height), Point((XPos - Left), (YPos - Top))) then
      RESULT := htBottomRight

      // Bewegen ohne Titlebar
    //else if RESULT = HTCLIENT then
    //  RESULT := htCaption
    else
      inherited;
end;