RichEdit sometimes leaves a "ghost" scrollbar on maximize

[Stilez]

The attached code displays a resizeable window with a rich text control containing help (source RTF file for the control contents attached in case it's significant, though I doubt it)

When you resize the GUI by dragging the bottom-right corner the rich text control works fine.

However, if you maximize the GUI with the caption "maximize" button, the vertical scrollbar is still shown as a "ghost" in its original position (relative to the control) in the middle of the rich text control.

Especially happens if you resize the GUI smaller by dragging bottom-right, then click "maximize".

See also attached screenshot.

[anonymous]

rtf file used "in case" (probably not relevant)

[Stilez]

screenshot of the bug

[Zedna]

Try to use

GUIRegisterMsg($WM_SIZE, "WM_SIZE")

[trancexx]

Use GUIRegisterMsg to process specific messages yourself. That's not UDF's job. Parent window is your responsibility.