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WM_CAP_GET_USER_DATA
The WM_CAP_GET_USER_DATA message retrieves a LONG data value associated with a
capture window. You can send this message explicitly or by using the capGetUserData macro.
WM_CAP_GET_USER_DATA
wParam = (WPARAM) 0;
lParam = 0L;
Return Values
Returns a value previously saved by using the WM_CAP_SET_USER_DATAmessage.
See Also
capGetUserData, WM_CAP_SET_USER_DATA
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