# Function Reference

# IsDllStruct

Checks if a variable is a DllStruct type.

IsDllStruct ( variable )

## Parameters

variable | The variable/expression to check.

## Return Value

Success: | 1.
Failure: | 0 if expression is not DllStruct type as return by DllStructCreate.

## Remarks

See language datatypes for a detailed description.

## Related

DllStructCreate, VarGetType

## Example

    #include <MsgBoxConstants.au3>

    Local $tStruct = DllStructCreate("wchar[256]")
    If IsDllStruct($tStruct) Then
        MsgBox($MB_SYSTEMMODAL, "", "The variable is a dll structure")
    Else
        MsgBox($MB_SYSTEMMODAL, "", "The variable is not a dll structure")
    EndIf