Subscript used on non-accessible variable

[spuuunit 0]

This is my code:

While 1
    While WinActive("PicTor - ") AND NOT WinActive("PicTor - Microsoft Visual Studio")  ; PicTor
        $pos = WinGetPos("[ACTIVE]")
        $size = WinGetClientSize("[ACTIVE]")
        If $pos[0] = 0 AND $pos[1] = 0 AND $size[0] = 1920 AND $size[1] = 1080 Then
            ; do something
        EndIf
        Sleep(10)
    WEnd
    Sleep(10)
WEnd

I get this error message sometimes when loosing focus off the "PicTor" window. When minimizing "PicTor" for example. I don't understand why... Why can't the script access $size[0]? I just declared it.

[Jos 2,450]

Check the Helpfile for WinGetClientSize() and see what it return when not found and you have your answer.  

[spuuunit 0]

Oh thanks. It says sets the @error flag to non-zero if the window is not found. What does non-zero mean?

[spuuunit 0]

Oh wait I think I got it now! Thank you for your help! 😄

[Jos 2,450]

2 minutes ago, spuuunit said:

What does non-zero mean?

@error <> 0

So test for success as you really always need to do!

[Musashi 530]

Since WinGetClientSize() returns an array in case of success, you could also check the variable with IsArray

 

[JockoDundee 632]

1 hour ago, Musashi said:

Since WinGetClientSize() returns an array in case of success, you could also check the variable with IsArray

I do it like this:

$size=WinGetClientSize("[ACTIVE]")

If $size<>0 And $size[0]=1920 AND $size[1]=1080 Then ...