Removing firemonkey from Windows taskbar

Question

Is there a way, to remove my firemonkey application form Windows XP/vista/7 taskbar? There is no info when i google.

The problem:

How to hide the form that is located in a dll from the Windows taskbar.

You can set `Application.MainFormOnTaskBar` to `False`. But it has no effect on the resulting app! — David Heffernan, Jan 02 '12 at 13:56
Are you writing a true FMX app, or are you just showing a single FMX form as part of a larger VCL app? — David Heffernan, Jan 02 '12 at 13:57
@DavidHeffernan: its a dll form, the answer is in first post. Anyways, thank you for trying :) — Knobik, Jan 02 '12 at 14:00
Please move the solution part to an answer and mark it as correct. — Matthew Strawbridge, Jan 02 '12 at 14:13
@Talibek It would surely be easier to avoid using FMX. What feature of FMX are you using? — David Heffernan, Jan 02 '12 at 16:49
window transparency + cleartype font on canvas (AA) (some sort of OSD) — Knobik, Jan 03 '12 at 17:18

score 2 · Accepted Answer · edited May 23 '17 at 11:48

NB: Talibek answered his own question within the question, for clarity I have moved it here.

You need to get your main form handle (Form1.Handle), because there is no Application.handle in firemonkey, then convert it with FmxHandleToHWND (FMX.Platform.Win) to normal window handle. From your host application, you need to retrive that handle (you can export a function with it) and do this:

  h := GetHandle();

  ShowWindow(h, SW_HIDE);
  SetWindowLong(h, GWL_EXSTYLE, GetWindowLong(h, GWL_EXSTYLE) or 
      WS_EX_TOOLWINDOW);
  ShowWindow(h, SW_SHOW);

Retrieving handle:

class function TForm1.returnHandle(): integer;
begin
  result := FmxHandleToHWND(Form1.Handle);
end;

Of course, the Application.MainFormOnTaskBar property needs to be set to true so the form can handle the application.

Hope it helps somebody.

`Application.MainFormOnTaskBar` appears to be declared as a public field and then never references, at least in the FMX source that I can see. — David Heffernan, Jan 02 '12 at 16:48

Removing firemonkey from Windows taskbar

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