DRV_QUERYCONFIGURE

The DRV_QUERYCONFIGURE message requests a user-mode multimedia driver to return a value indicating whether it provides modifiable operating parameters.

Parameters

dwDriverID

Driver instance identifier. This is the value returned by the driver in response to the DRV_OPEN message.

hDriver

Driver handle.

uMsg

DRV_QUERYCONFIGURE

lParam1

Not used. Set to zero.

lParam2

Not used. Set to zero.

Return Value

If the driver supports modifiable parameters, it should return a nonzero value. Otherwise it should return zero.

Comments

The DRV_QUERYCONFIGURE message is one of the standard driver messages. A client sends the message by calling the driver’s DriverProc entry point, passing the specified parameter values. Typically, this message is sent by the Control Panel’s Multimedia applet.

Drivers receive a DRV_OPEN message before receiving DRV_QUERYCONFIGURE.

If a driver provides modifiable parameters, it displays a dialog box when it receives a DRV_CONFIGURE command.