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#112: How can I press a mouse button from code?

Sometimes you need press a left and/or right mouse button from code without any user activity. For example, as part of demo program which demonstrates the possibilities of your application. You can use the next procedures which simulates a mouse activity:

procedure PressMouseDown(IsLeftButton: Boolean);
begin
  if IsLeftButton then
    mouse_event(MOUSEEVENTF_LEFTDOWN, 0, 0, 0, 0)
  else
    mouse_event(MOUSEEVENTF_RIGHTDOWN, 0, 0, 0, 0);
end;

procedure PressMouseUp(IsLeftButton: Boolean);
begin
  if IsLeftButton then
    mouse_event(MOUSEEVENTF_LEFTUP, 0, 0, 0, 0)
  else
    mouse_event(MOUSEEVENTF_RIGHTUP, 0, 0, 0, 0);
end;

procedure ClickMouseButton(IsLeftButton: Boolean);
begin
  PressMouseDown(IsLeftButton);
  PressMouseUp(IsLeftButton);
end;

So if you need "click" on mouse button, call the ClickMouseButton procedure.
But if you need "press" on button, do a something and release a button, then call a PressMouseDown, execute the some own code and call the PressMouseUp.


Published: January 6, 2001

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