Can't get FindString / SelectString to work with combobox

[mireazma]

The application I is most probably made with MSVS. Here's how I reproduced a similar one:

 

Here's the AutoIt Window info:

 

Here's the code I used, results are commented in the code:

expandcollapse popup

Global $window = "AU3 sand"

WinActivate($window)
WinWaitActive($window)


Global $txt2 = ControlGetText($window, "", "[CLASSNN:Edit1]")

MsgBox(0, "", $txt2)

 ; refocused as advised in the help file
WinActivate($window)
WinWaitActive($window)



 ; edit  - yields 0
Global $grab1 = ControlCommand($window, "", "[CLASS:Edit; INSTANCE:1]", "FindString",'fast')
 ; edit  - yields 0
Global $grab2 = ControlCommand($window, "", "[ID:1001]", "FindString",'fast')
 ; combo  - yields 0
Global $grab3 = ControlCommand($window, "", "[CLASS:WindowsForms10.COMBOBOX.app.0.141b42a_r24_ad1; INSTANCE:1", "FindString",'fast')
 ; combo  - yields 0
Global $grab4 = ControlCommand($window, "", "[NAME:comboBox2]", "FindString",'fast')
 ; combo  - yields 0
Global $grab5 = ControlCommand($window, "", "[ID:198018]", "FindString",'fast')
 ; list  - yields 0
Global $grab6 = ControlCommand($window, "", "[CLASS:Progman; INSTANCE:1]", "FindString",'fast')
 ; the list doesn't have an ID so I can't use `ID`

MsgBox(0, "", $grab1 & $grab2 & $grab3 & $grab4 & $grab5 & $grab6) ; yields 000000

WinActivate($window)
WinWaitActive($window)

 ; does nothing
ControlCommand($window, "", "[CLASS:WindowsForms10.COMBOBOX.app.0.141b42a_r24_ad1; INSTANCE:1", "SelectString",'medium')
 ; does nothing
ControlCommand($window, "", "[CLASS:Progman; INSTANCE:1]", "SelectString",'medium')
 ; does nothing
ControlCommand($window, "", "[CLASS:Progman; INSTANCE:1]", "SelectString",'medium')

I've also checked this topic to no avail:
https://www.autoitscript.com/forum/topic/123094-select-value-from-dropdown/

[Nine]

You are missing a "]" 

Global $grab3 = ControlCommand($window, "", "[CLASS:WindowsForms10.COMBOBOX.app.0.141b42a_r24_ad1; INSTANCE:1]", "FindString",'fast')