WinSetVisibleRegionNotify - Parameters

hwnd (HWND) - input

The window handle.

fEnable (BOOL) - input

Enable flag.

TRUE

The specified window wants to receive notifications every time its visible region is modified.
FALSE
The specified window no longer wants to receive any notification messages concerning its visible region.

fSuccess (BOOL) - returns

Success indicator.

TRUE

Successful completion
FALSE
Error occurred.

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