|
DriverProc
Processes driver messages for the installable driver. DriverProc is a driver-supplied function.
LONG DriverProc(DWORD dwDriverId, HDRVR hdrvr, UINT msg,
LONG lParam1, LONG lParam2);
Parameters
dwDriverId
Identifier of the installable driver.
hdrvr
Handle of the installable driver instance. Each instance of the installable
driver has a unique handle.
msg
Driver message value. It can be a custom value or one of these standard values:
DRV_CLOSE
| Notifies the driver that it should decrement its usage count and unload the
driver if the count is zero.
| DRV_CONFIGURE
| Notifies the driver that it should display a configuration dialog box. This
message is sent only if the driver returns a nonzero value when processing the DRV_QUERYCONFIGURE message.
| DRV_DISABLE
| Notifies the driver that its allocated memory is about to be freed.
| DRV_ENABLE
| Notifies the driver that it has been loaded or reloaded or that Windows has
been enabled.
| DRV_FREE
| Notifies the driver that it will be discarded.
| DRV_INSTALL
| Notifies the driver that it has been successfully installed.
| DRV_LOAD
| Notifies the driver that it has been successfully loaded.
| DRV_OPEN
| Notifies the driver that it is about to be opened.
| DRV_POWER
| Notifies the driver that the device's power source is about to be turned on or
off.
| DRV_QUERYCONFIGURE
| Directs the driver to specify whether it supports the DRV_CONFIGURE message.
| DRV_REMOVE
| Notifies the driver that it is about to be removed from the system.
|
lParam1 and lParam2
32-bit message-specific value.
Return Value
Returns nonzero if successful or zero otherwise.
Remarks
When msg is DRV_OPEN, lParam1 is the string following the driver filename from the SYSTEM.INI file and lParam2 is the value given as the lParam parameter in a call to the OpenDriver function.
When msg is DRV_CLOSE, lParam1 and lParam2 are the same values as the lParam1 and lParam2 parameters in a call to the CloseDriver function.
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