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WM_CAP_SET_USER_DATA
The WM_CAP_SET_USER_DATA message associates a LONG data value with a capture window. You can send this message explicitly or by
using the capSetUserData macro.
WM_CAP_SET_USER_DATA
wParam = (WPARAM) 0;
lParam = (LPARAM)lUser;
Parameters
lUser
Data value to associate with a capture window.
Return Values
Returns TRUE if successful or FALSE if streaming capture is in progress.
Remarks
Typically this message is used to point to a block of data associated with a
capture window.
See Also
capSetUserData
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