See also ICSETSTATUSPROC
wParam = (DWORD) (LPVOID) icsetstatusProc; lParam = sizeof(icsetstatusProc);
Provides a status callback function with the status of a lengthy operation.
wParam
Address of an ICSETSTATUSPROC structure.
lParam
Size of the ICSETSTATUSPROC structure.
Support of this function is optional but strongly recommended if compression or decompression takes longer than approximately 0.1 seconds.
An application can send this message periodically to a status callback function during lengthy operations.
For information about status callback functions, see .