How to stretch a form across multiple monitors?

Question

Delphi

Hello!
How to stretch a form across multiple monitors?
Now I'm stretching it to full screen like this:

Form2.Width := Screen.DesktopWidth;
Form2.Height := Screen.DesktopHeight;

But the form only stretches on the active monitor.

Answer 1

Try also setting Left and Top

Form2.Left := Screen.DesktopLeft;
Form2.Top := Screen.DesktopTop;

Answer 2

The Vcl.Forms module has a TScreen class through which you can enumerate monitors and get their properties.
The class does not need to be created, it is already created in the global variable Screen
Like this:

i, TotalWidth , TotalHeight : Integer;
for i = 0 to Screen.MonitorCount -1 do
begin
  TotalWidth := TotalWidth + Screen.Monitors[i].Width;
  TotalHeight := TotalHeight + Screen.Monitors[i].Heigth;
end;
 Form.Width := TotalWidth;
 Form.Heigth := TotalHeight ;

wrote the code on the knee.

Answer 3

The problem is different. Screen.DesktopWidth specifies the full size of the entire desktop (it's the sum of all monitors). And I checked, the window is stretched to both monitors. Look at the form settings: WindowState