Author: Tomas Rutkauskas

Show a window "TopMost" - even when it is inactive

Answer:

To show a window above all other windows even when it is not the active window/ 
active application, use this API call:
1   
2   SetWindowPos(Form1.handle, HWND_TopMost, 0, 0, 0, 0,
3     SWP_NoMove or SWP_NoSize or SWP_ShowWindow);