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.