{{page>en:templates:win16api}}

====== SendDriverMessage ======

===== Brief =====

Sends a message to an installable driver.

===== Syntax =====

LRESULT WINAPI SendDriverMessage(HDRVR hDriver, UINT message, LPARAM lParam1, LPARAM lParam2);

===== Parameters =====

  * **hDriver**  
  Handle to the installable driver.
  * **message**  
  Driver-specific message.
 DRV_LOAD, DRV_ENABLE, DRV_OPEN, DRV_CLOSE, DRV_DISABLE, DRV_FREE, DRV_INSTALL, DRV_QUERYCONFIGURE, DRV_CONFIGURE, DRV_REMOVE, DRV_RESERVED, DRV_USER.
  * **lParam1**  
  First message parameter.
  * **lParam2**  
  Second message parameter.

===== Return Code =====

Returns nonzero if successful or zero otherwise.

===== Notes =====

The exact meaning of parameters depends on the driver.

===== C Binding =====
<code c>
LRESULT result = SendDriverMessage(hDriver, DRV_OPEN, 0, 0);
</code>

===== MASM Binding =====

<code asm>
push lParam2
push lParam1
push message
push hDriver
call SendDriverMessage
</code>

===== See also =====

[[en:docs:win16:api:user:OPENDRIVER]], [[en:docs:win16:api:user:CLOSEDRIVER]]