_WinAPI_InvalidateRect timing problem

[jimg]

I'm trying to "erase" my GUI before updating it with new data, and the _WinAPI_InvalidateRect function works okay, but I have to sleep(1) before continuing. After the _WinAPI_InvalidateRect , I do two INetGetSource functions, which certainly take more than a millisecond, before doing any further GUI functions.

_WinAPI_InvalidateRect($hWnd, 0, True) ;erase

sleep(1)

$text = _INetGetSource (

several dozen script lines

$text = _INetGetSource (

several dozen script lines

_GDIPlus_GraphicsDrawLine ($hGraphic, 100, 5, 100, 200)

If I comment out the sleep(1) line, the result is a flicker, then blank, although it sometimes works. Is there a status check I need to add?

[ProgAndy]

What happens, if you use _WinAPI_RedrawWindow ?

[jimg]

What happens, if you use _WinAPI_RedrawWindow ?

That works without the sleep(1) instruction. Thanks.