MIXEROPENDESC
typedef struct tMIXEROPENDESC
{
HMIXER hmx;
LPVOID pReserved0;
DWORD dwCallback;
DWORD dwInstance;
} MIXEROPENDESC;
The MIXEROPENDESC structure contains information needed by user-mode mixer
drivers. The structure is created by winmm.dll and passed to the driver
with an MXDM_OPEN message.
Members
-
hmx
-
Specifies the client’s handle to the device, as assigned by winmm.dll.
User-mode drivers specify this handle as the hDriver parameter to DriverCallback,
when sending a callback message.
-
dwCallback
-
Specifies the address of a callback function. (See the description of the MXDM_OPEN
message.)
-
dwInstance
-
Contains the dwCallbackInstance argument that the client specified when
calling the mixerOpen function. This value is returned to the client as
the dwInstance parameter to DriverCallback.