The ICGetStateSize macro queries a video compression driver to determine the amount of memory required to retrieve the configuration information. You can use this macro or explicitly call the ICM_GETSTATE message.
DWORD ICGetStateSize(
hic
);
Returns the amount of memory, in bytes, required by the state information.
The structure used to represent configuration information is driver specific and is defined by the driver.
Use ICGetStateSize before calling the ICGetState macro to determine the size of buffer to allocate for the call.
Windows NT: Requires version 3.1 or later.
Windows: Requires Windows 95 or later.
Windows CE: Unsupported.
Header: Declared in vfw.h.
Video Compression Manager Overview, Video Compression Macros, ICGetState, ICM_GETSTATE