WM_CAP_GET_USER_DATA message

The WM_CAP_GET_USER_DATA message retrieves a LONG_PTR 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 Value

Returns a value previously saved by using the WM_CAP_SET_USER_DATA message.

Requirements

Requirement Value
Minimum supported client
Windows 2000 Professional [desktop apps only]
Minimum supported server
Windows 2000 Server [desktop apps only]
Header
Vfw.h

See also

Video Capture

Video Capture Messages