ExeOutputWindow => correct usage?

[r0n]

If I have a macro that is an .exe and I want to output something in the output window:

Macro test_output

Code:

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str a="abc"
ExeOutputWindow 4 "Show output"
out a

mes("close?")

I need to have a messagebox in order for the output window to be kept shown.
If I remove the messagebox the messagebox will be rendered in and out so quickly I often can not even see it.

Is there a way around this? (without using a messagebox)