MdmDriverNotify: Difference between revisions
Created page with "{{DISPLAYTITLE:mdmDriverNotify}} This function is called from MCDs to return messages to applications. Returned information includes command status, cuepoints, position changes, playlist messages, and device specific events. ==Syntax== _mdmDriverNotify(usDeviceID, hwnd, usMsgType, usUserParm, ulMsgParm) ==Parameters== ;''usDeviceID'' (USHORT) - input :Device ID to be associated with this message. ;''hwnd'' (HWND) - input :The window handle used to post or send..." |
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Revision as of 02:24, 26 November 2025
This function is called from MCDs to return messages to applications. Returned information includes command status, cuepoints, position changes, playlist messages, and device specific events.
Syntax
_mdmDriverNotify(usDeviceID, hwnd, usMsgType, usUserParm, ulMsgParm)
Parameters
- usDeviceID (USHORT) - input
- Device ID to be associated with this message.
- hwnd (HWND) - input
- The window handle used to post or send message to application.
- usMsgType (USHORT) - input
- Type of notification:
- usUserParm (USHORT) - input
- User-defined parameter.
- ulMsgParm (ULONG) - input
- Message-defined parameter.
Returns
- rc (ULONG) - returns
- Return codes indicating success or type of failure:
- MCI_NOTIFY_SUCCESS If the function succeeds, 0 is returned.
- MM_MCIPOSITIONCHANGE The media position in MMTIME units.
- MM_MCICUEPOINT Media position in MMTIME units.
- MM_MCIPLAYLISTMESSAGE Parameter specified by playlist message instruction (Operand 2).
- MM_MCIEVENT Device-specific parameter.
Remarks
This section has no remarks.
Example Code
#define INCL_MMIO
#include <os2.h>
USHORT usDeviceID; /* Device ID for message. */
HWND hwnd; /* Window handle. */
USHORT usMsgType; /* Notification type. */
USHORT usUserParm; /* User-defined. */
ULONG ulMsgParm; /* Message-defined. */
ULONG rc; /* Return codes. */
rc = mdmDriverNotify(usDeviceID, hwnd, usMsgType,
usUserParm, ulMsgParm);