==== MouGetNumButtons ====

**Bindings**: [[getnumbtns#C bindings|C]], [[getnumbtns#MASM bindings|MASM]]

This call returns the number of buttons supported on the installed mouse driver. 

//MouGetNumButtons// (NumberOfButtons, DeviceHandle) 

//NumberOfButtons// (**PUSHORT**) - output 
Address of the number of physical buttons. The return values for the number of buttons supported are: 

^Value ^Definition ^
|1 |One mouse button |
|2 |Two mouse buttons |
|3 |Three mouse buttons. |

//DeviceHandle// (**HMOU**) - input 
Handle of the mouse device from a previous [[en:ibm:prcp:mou:open|MouOpen]]. 

//rc// (**USHORT**) - return 
Return code descriptions are: 

|385 |ERROR_MOUSE_NO_DEVICE |
|466 |ERROR_MOU_DETACHED |
|501 |ERROR_MOUSE_NO_CONSOLE |
|505 |ERROR_MOU_EXTENDED_SG |

=== C bindings ===

<code c>
#define INCL_MOU

USHORT  rc = MouGetNumButtons(NumberOfButtons, DeviceHandle);

PUSHORT          NumberOfButtons;  /* Number of mouse buttons */
HMOU             DeviceHandle;     /* Mouse device handle */

USHORT           rc;               /* return code */
</code>

=== MASM bindings ===

<code asm>
EXTRN  MouGetNumButtons:FAR
INCL_MOU            EQU 1

PUSH@  WORD    NumberOfButtons ;Number of mouse buttons
PUSH   WORD    DeviceHandle    ;Mouse device handle
CALL   MouGetNumButtons

Return WORD
</code>