isGadget(gadget)

use FindWindow.

decls

API_FindWindow%(lpClassName%,lpWindowName$):"FindWindowA"
API_IsWindow%(hwnd%):"IsWindow"

blitz+ code

window_test = CreateWindow("Test Window - Default (15)",0,500,400,100,0)

Notify isWindow("Test Window - Default (15)")

; wait until the user closes one of the windows
Repeat
	If WaitEvent()=$803 Then Exit
Forever
End ; bye!

Function isWindow(window_title$)

hwnd = API_FindWindow(0,window_title$)
Return API_IsWindow(hwnd)

End Function