Hallo Floooooo24,
hast du mal versucht die $ParentGUI anzugeben?
_Metro_CreateGUI($Title, $Width, $Height[, $Left = -1[, $Top = -1[, $AllowResize = False[, $ParentGUI = ""]]]])
; #FUNCTION# ====================================================================================================================
; Name ..........: _Metro_CreateGUI
; Description ...: Creates a modern borderless GUI with the colors of the selected theme.
; Syntax ........: _Metro_CreateGUI($Title, $Width, $Height[, $Left = -1[, $Top = -1[, $AllowResize = False[, $ParentGUI = ""]]]])
; Parameters ....: $Title - Title of the window
; $Width - Width
; $Height - Height
; $Left - [optional] Window pos X. Default is -1.
; $Top - [optional] Window pos Y. Default is -1.
; $AllowResize - [optional] True/False. Default is False. ;Enables resizing + drag move for the gui.
; $ParentGUI - [optional] Handle to the parent gui. Default is "".
; Return values .: Handle to the created gui
; Example .......: _Metro_CreateGUI("Example", 500, 300, -1, -1, True)
; ===============================================================================================================================
Benutze selbst immer mal die _Metro_CreateGUI, habe aber bisher keine 2 GUI's in einem Script benötigt.
Gruß gmmg