# Function Reference

# IsHWnd

Checks if a variable's base type is a pointer and window handle.

IsHWnd ( variable )

## Parameters

variable | The variable/expression to check.

## Return Value

Success: | 1 if the expression is a pointer type AND a valid window handle.
Failure: | 0 if expression is not a pointer OR not a valid window handle.

## Remarks

See language datatypes for a detailed description.

## Related

GUICtrlGetHandle, IsArray, IsBinary, IsBool, IsFloat, IsInt, IsMap, IsNumber, IsPtr, IsString, VarGetType

## Example

    #include <MsgBoxConstants.au3>

    Example()

    Func Example()
        ; Run Notepad
        Run("notepad.exe")

        ; Wait 10 seconds for the Notepad window to appear.
        Local $hWnd = WinWaitActive("[CLASS:Notepad]", "")

        ; Test if the window was found and display the results.
        If IsHWnd($hWnd) Then
            MsgBox($MB_SYSTEMMODAL, "", "It's a valid HWND")
        Else
            MsgBox($MB_SYSTEMMODAL, "", "It's not a valid HWND")
        EndIf
    EndFunc   ;==>Example