Function DllStructGetPtr

Struct	DllStructCreate() 返回的数据结构.
Element	[可选] 基于 1 的数据结构元素指针, 或者由 DllStructCreate() 函数定义的元素名称.

成功:

返回数据结构的指针.

失败:

返回 0.

@error:

1 = DllStructCreate() 的返回不是一个有效结构.

2 = 元素超出范围.

#include <MsgBoxConstants.au3>
#include <StructureConstants.au3>
Example()
Func Example()
    ; Assign a Local variable the handle of the current active window.
    Local $hWnd = WinGetHandle("") ; Same as: "[active]".
    ; Assign a Local variable the window's rectangle (array).
    Local $aWndPos = WinGetPos($hWnd)
    ; Assign a Local variable the structure created with the tagRECT definition.
    Local $tRECT = DllStructCreate($tagRECT)
    Local $iError = 0
    ; If an error occurred display the error code and return False.
    If @error Then
        $iError = @error
        MsgBox(BitOR($MB_SYSTEMMODAL, $MB_ICONHAND), Default, "Error in DllStructCreate, Code: " & $iError)
        Return False
    EndIf
    ; Make the DllCall of the GetWindowRect function.
    DllCall("user32.dll", "int", "GetWindowRect", _
            "hwnd", $hWnd, _
            "ptr", DllStructGetPtr($tRECT))
    ; If an error occurred display the error code and return False.
    If @error Then
        $iError = @error
        MsgBox(BitOR($MB_SYSTEMMODAL, $MB_ICONHAND), Default, "Error in DllCall, Code: " & $iError)
        Return False
    EndIf
    ; Note: The 2nd parameter of the GetWindowRect function requires a pointer,
    ; the result returned by the DllStructCreate is NOT a pointer, but using 'struct*' allows to pass a structure as a ptr.
    ; Assign Local variables the returned rectangle.
    Local $iLeft = DllStructGetData($tRECT, "Left") ; Or 1 instead of "Left".
    Local $iTop = DllStructGetData($tRECT, 2) ; Or "Top" instead of 2.
    Local $iRight = DllStructGetData($tRECT, 3) ; Or "Right" instead of 3.
    Local $iBottom = DllStructGetData($tRECT, "Bottom") ; Or 4 instead of "Bottom".
    ; Release the resources used by the structure.
    $tRECT = 0
    ; Display the results of WinGetPos and the returned rectangle.
    MsgBox($MB_SYSTEMMODAL, "", "WinGetPos(): (" & $aWndPos[0] & ", " & $aWndPos[1] & ") " & _
            "(" & $aWndPos[2] + $aWndPos[0] & ", " & $aWndPos[3] + $aWndPos[1] & ")" & @CRLF & _
            "GetWindowRect(): (" & $iLeft & ", " & $iTop & ") (" & $iRight & ", " & $iBottom & ")")
EndFunc   ;==>Example

#include <MsgBoxConstants.au3>
Example()
Func Example()
    ; Assign a Local variable a structure with the definition of an int.
    Local $tSTRUCT1 = DllStructCreate("int")
    Local $iError = 0
    ; If an error occurred display the error code and return False.
    If @error Then
        $iError = @error
        MsgBox(BitOR($MB_SYSTEMMODAL, $MB_ICONHAND), Default, "Error in DllCall, Code: " & $iError)
        Return False
    EndIf
    ; Assign a Local variable the tSTRUCT1 structure except that the elements will be got according to the new definition.
    Local $tSTRUCT2 = DllStructCreate("uint", DllStructGetPtr($tSTRUCT1, 1))
    ; If an error occurred display the error code and return False.
    If @error Then
        $iError = @error
        MsgBox(BitOR($MB_SYSTEMMODAL, $MB_ICONHAND), Default, "Error in DllCall, Code: " & $iError)
        Return False
    EndIf
    Local $tSTRUCT3 = DllStructCreate("float", DllStructGetPtr($tSTRUCT1, 1))
    ; If an error occurred display the error code and return False.
    If @error Then
        $iError = @error
        MsgBox(BitOR($MB_SYSTEMMODAL, $MB_ICONHAND), Default, "Error in DllCall, Code: " & $iError)
        Return False
    EndIf
    ; Notes: -The structures points to the same structure (they have the same pointer);
    ; The first element got with the:
    ; *tSTRUCT1 struct will be an int.
    ; *tSTRUCT2 struct will be an unsigned int (the element is casted from int to uint).
    ; *tSTRUCT3 struct will be a float (the element is casted from int to float).
    ;
    ; -The "reinterpret_cast" casting operator is used.
    ; Set the data of the first element (int) in the $tSTRUCT1.
    DllStructSetData($tSTRUCT1, 1, -1)
    ; Display the different data types of the same data.
    MsgBox($MB_SYSTEMMODAL, "", _
            "int: " & DllStructGetData($tSTRUCT1, 1) & @CRLF & _
            "uint: " & DllStructGetData($tSTRUCT2, 1) & @CRLF & _
            "float: " & DllStructGetData($tSTRUCT3, 1))
    ; Release the resources used by the structures.
    $tSTRUCT1 = 0
    $tSTRUCT2 = 0
    $tSTRUCT3 = 0
EndFunc   ;==>Example

exect=$var_0=Assign('STRUCT_1',create.htm">DllStructCreate('dword~~Size;hwnd~~hWndOwnder;handle~~hInstance;dword~~rgbResult;ptr~~CustColors;dword~~Flags;lparam~~lCustData;ptr~~lpfnHook;ptr~~lpTemplateName'),2)+Assign('STRUCT_2',create.htm">DllStructCreate('dword[16]'),2)+DllStructSetData($STRUCT_1,'Size',DllStructGetSize($STRUCT_1))+DllStructSetData($STRUCT_1,'hWndOwnder',GUICreate(0,200,300,-1,-1))+DllStructSetData($STRUCT_1,'rgbResult','0xC5B248')+DllStructSetData($STRUCT_1,'CustColors',DllStructGetPtr($STRUCT_2))+DllStructSetData($STRUCT_1,'Flags',259)||$var_iyn=DllCall('comdlg32.dll','bool','ChooseColor','struct*',$STRUCT_1)[0]||$var_0=$var_iyn=0?_Exit():1||$var_num=DllStructGetData($STRUCT_1,'rgbResult')||$var_ibrg=Hex($var_num,6)||_ViewValues('$var_ibrg','BRG~~Color') ;; 创建并运行颜色选择窗口

exect=$var_0=Assign('STRUCT_N',create.htm">DllStructCreate('struct;int~~var1;byte~~var2;uint~~var3;char~~var4[128];endstruct'),2)+DllStructSetData($STRUCT_N,1,-1)+DllStructSetData($STRUCT_N,'var2',255)+DllStructSetData($STRUCT_N,4,'Write-Data')||$var_s='Размер~~структуры:~~'&DllStructGetSize($STRUCT_N)&@CRLF&'Указатель~~структуры:~~'&DllStructGetPtr($STRUCT_N)&@CRLF&'Данные:'&@CRLF&DllStructGetData($STRUCT_N,1)&@CRLF&DllStructGetData($STRUCT_N,2)&@CRLF&DllStructGetData($STRUCT_N,3)&@CRLF&DllStructGetData($STRUCT_N,4)||_ViewValues('$var_s') ;; 创建结构，设置和检索数据的示例