Get the call's User Data pointer.
LVCA_API BOOL WINAPI LVCA_GetUserData(HANDLE hCA, LPVOID*Param);
If successful, LVCA_GetUserData returns true. If false is returned, call LVCA_GetLastCallError to retrieve the error code and message.
CAMSG_CALLSTART
CAMSG_CALLSTOP
CAMSG_ENTERMODULE
CAMSG_REC_BEFORE_CONFIRM
CAMSG_REC_AFTER_CONFIRM
CAMSG_TIMEOUT
CAMSG_ERROR
hCA (IN) The handle given by the event callback.
Param (OUT) The pointer which will be set to the call's User Data pointer.
The LVCA_GetUserData function will set the passed pointer to the call's User Data. LVCA_SetUserData sets this pointer. Each call maintains a unique pointer. The User Data pointer is usually used to maintain a class or structure that holds call specific information.
Warning: This function is equivalent to calling LVCA_GetUserDataA with the identifier parameter pointing to an empty string.
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