DriverProc

LRESULT
    DriverProc (
        DWORD dwDriverID,
        HDRVR hDriver,
        UINT uMsg,
        LPARAM lParam1,
        LPARAM lParam2
        );

The DriverProc function is a user-mode driver’s entry point.

Parameters

dwDriverID

Instance identifier. This value is message-dependent.

hDriver

Driver handle.

uMsg

One of the standard driver messages or one of the customized driver messages.

lParam1

Message-dependent parameter.

lParam2

Message-dependent parameter.

Return Value

DriverProc returns a value that is dependent upon the message.

Comments

All user-mode multimedia drivers must define a DriverProc function. The DriverProc function name must be exported in a module definition (.def) file.

The meanings of the dwDriverID, lParam1, and lParam2 parameters are dependent upon the message that the driver receives as the uMsg parameter value. Refer to the description of each message to determine the meanings of these parameters.

For more information about DriverProc, see User-Mode Driver Entry Points.