OpenSaveDialog: defExt - default extension

[r0n]

How do I set the default extension to: *.txt, if the filter is:

"exe files[]*.exe[]txt files[]*.txt[]All Files[]*.*[]"

Macro Macro25

Code:

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str defExt
str s
if OpenSaveDialog(0 s "exe files[]*.exe[]txt files[]*.txt[]All Files[]*.*[]" defExt )
,out s

I tried the following, but it still keeps the .exe as default extension

Macro Macro25

Code:

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defExt="txt"
defExt=".txt"
defExt="*.txt"
defExt="txt files"

I assume that normally only folders and .exe are displayed when the opensave dialog is opened, if the below filter is used:

Code:

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"exe files[]*.exe[]txt files[]*.txt[]All Files[]*.*[]"

And with 'defExt' I can set another extension to be shown when the opensave dialog is opened.
Alternatively I could set the the 'txt' extension first in the filter, but I was wondering how to use 'defExt'