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**UNREGISTER(** [//event //] [,// handler //] [,// object// ] [,//window//] [,//control//] **)**

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| **UNREGISTER** | Unregisters an event handling procedure. |
| //event// | An integer constant, variable, expression, or EQUATE containing an event number. A value in the range 400h to 0FFFh is a User-defined event. If omitted, all //events// are unregistered. |
| //handler// | A LONG variable, or expression containing the return value from ADDRESS for the PROCEDURE to handle the //event//. If omitted, all //handlers// are unregistered. |
| //object// | A LONG integer constant, variable, or expression containing any 32-bit unique value to identify the specific //handler//. This is generally the return value of ADDRESS(SELF) when the //handler// is a CLASS method. |
| //window// | The label of the WINDOW or REPORT whose //event// to handle. If omitted, the current target WINDOW or REPORT is assumed. |
| //control// | An integer constant, EQUATE, variable, or expression containing the field number of the specific control whose //event// to handle. If omitted, the //event// is handled for every control on the //window//. |

**UNREGISTER** prevents a previously REGISTERed event //handler// PROCEDURE from being called to handle its //event//.

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Can also be prototyped as **UNREGISTEREVENT**.

**Example:**

**WindowResizeClass.Kill PROCEDURE**

** CODE**

** ****UNREGISTER****(EVENT:Sized,ADDRESS(SELF.TakeResize),ADDRESS(SELF))**

** !Other code follows**

**WindowResizeClass.TakeResize PROCEDURE**

**ReturnValue  BYTE**

** CODE**

** ReturnValue  = Level:Benign**

** RETURN(ReturnValue)**

**See Also:**

[[register  register event handler .htm|REGISTER]]

[[accept  the event processor .htm|ACCEPT]]

[[event  return event number .htm|EVENT]]