User Data Messages

You can associate data with a capture window by using the WM_CAP_GET_USER_DATA_50.1Q and WM_CAP_SET_USER_DATAGZ5L91 messages (or the capGetUserDataJ9VOO7 and capSetUserDataKJXI6J macros). You can retrieve a LONG data value by using the WM_CAP_GET_USER_DATA message and set a LONG data value by using the WM_CAP_SET_USER_DATA message.