Add child to existing window

[Gintaras]

Macro Macro1561

Code:

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int w=win("Calculator" "CalcFrame")
int c=CreateControl(0 "Edit" "text" 0 0 0 50 20 w -100)
out c

opt waitmsg 1
wait 5

DestroyWindow c

Most controls will not work, because parent window does not know about the control