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Das se normalerweise en Message WM_NCHITTEST geregelt.

Hier veces una kleines Ejemplo para una skalier / verschiebbaren Button. Sollte se wohl para una Ventana adaptar dejar.
Kompilieren Marca Separación

 $H Windows.ph
 $H Messages.ph
 $H Structs.ph
STRUCT TRect         = ~Rect
STRUCT TPoint        = ~Point

Proc HitTest

    Parameters hCtl&,lParam&
    Declare Point#
    Declare Rect#
    Dim Point#,TPoint
    Dim Rect#,TRect
    Point#.x& = LoWord(lParam&)
    Point#.y& = HiWord(lParam&)
    ~ScreenToClient(hCtl&,Point#)
    ~GetWindowRect(hCtl&,Rect#)
    ~MapWindowPoints(~GetDesktopWindow(),%Hwnd,Rect#,2)

    If (Point#.y& < 4) AND (Point#.x& < 4)

        Dispose Point#,Rect#
        Return  ~HTTOPLEFT

    ElseIf (Point#.y& < 4) AND (Point#.x& >= (Rect#.right& - Rect#.left&-4))

        Dispose Point#,Rect#
        Return  ~HTTOPRIGHT

    ElseIf (Point#.y& >= (Rect#.bottom& - Rect#.top&-4)) AND (Point#.x& >= (Rect#.right& - Rect#.left&-4))

        Dispose Point#,Rect#
        Return  ~HTBOTTOMRIGHT

    ElseIf (Point#.x& < 4) AND (Point#.y& >= (Rect#.bottom& - Rect#.top& - 4))

        Dispose Point#,Rect#
        Return  ~HTBOTTOMLEFT

    ElseIf Point#.y& < 4

        Dispose Point#,Rect#
        Return  ~HTTOP

    ElseIf Point#.x& < 4

        Dispose Point#,Rect#
        Return ~HTLEFT

    ElseIf Point#.x& >= (Rect#.right& - Rect#.left& - 4)

        Dispose Point#,Rect#
        Return ~HTRIGHT

    ElseIf Point#.y& >= (Rect#.bottom& - Rect#.top& - 4)

        Dispose Point#,Rect#
        Return ~HTBOTTOM

    Else

        Dispose Point#,Rect#
        Return ~HTCAPTION

    EndIf

EndProc

SubClassProc

    If SubClassMessage(&sWnd,~WM_NCHITTEST)

        Set("WinProc", 0)
        Return HitTest(&swnd,&slParam)

    Endif

EndProc

cls
Var Ende& = 0
Var Button& = Create("Button",%hwnd,"OK",10,10,120,30)
SubClass Button&,1

whilenot ende&

    wait

/a> endwhile

Ventana:

Julian57 (22.09.11)

Der Ver código fuente con wm_ncHitTest funktioniert wirklich super! Gracias Andreas

Kompilieren Marca Separación

 $H Windows.ph
 $H Messages.ph
 $H Structs.ph
STRUCT TRect = ~Rect
STRUCT TPoint = ~Punto

Proc HitTest

    Parámetros hCtl&,lParam&
    Declarar Punto#
    Declarar Rect#
    Dim Punto#,TPoint
    Dim Rect#,TRect
    Punto#.x& = LoWord(lParam&)
    Punto#.y& = HiWord(lParam&)
    ~ScreenToClient(hCtl&,Punto#)
    ~GetWindowRect(hCtl&,Rect#)
    ~MapWindowPoints(~GetDesktopWindow(),%Hwnd,Rect#,2)

    If (Punto#.y& < 4) AND (Punto#.x& < 4)

        Disponer Punto#,Rect#
        Volver  ~HTTOPLEFT

    ElseIf (Punto#.y& < 4) AND (Punto#.x& >= (Rect#.right& - Rect#.left&-4))

        Disponer Punto#,Rect#
        Volver  ~HTTOPRIGHT

    ElseIf (Punto#.y& >= (Rect#.bottom& - Rect#.top&-4)) AND (Punto#.x& >= (Rect#.right& - Rect#.left&-4))

        Disponer Punto#,Rect#
        Volver  ~HTBOTTOMRIGHT

    ElseIf (Punto#.x& < 4) AND (Punto#.y& >= (Rect#.bottom& - Rect#.top& - 4))

        Disponer Punto#,Rect#
        Volver  ~HTBOTTOMLEFT

    ElseIf Punto#.y& < 4

        Disponer Punto#,Rect#
        Volver  ~HTTOP

    ElseIf Punto#.x& < 4

        Disponer Punto#,Rect#
        Volver ~HTLEFT

    ElseIf Punto#.x& >= (Rect#.right& - Rect#.left& - 4)

        Disponer Punto#,Rect#
        Volver ~HTRIGHT

    ElseIf Punto#.y& >= (Rect#.bottom& - Rect#.top& - 4)

        Disponer Punto#,Rect#
        Volver ~HTBOTTOM

    Más

        Disponer Punto#,Rect#
        Volver ~HTCAPTION

    EndIf

ENDPROC

SubClassProc

    If SubClassMessage(&sWnd,~WM_NCHITTEST)

        Conjunto("WinProc", 0)
        Volver HitTest(&swnd,&slParam)

    Endif

ENDPROC

windowstyle 2+16+64
window 600,400
cls 255
var dg&=Crear("Window",%hwnd,"",10,10,200,100)
StartPaint dg&
cls 255
EndPaint
SubClass dg&,1
SubClass %hwnd,1

mientras que 1

    waitinput 30
    caso iskey(27) : end

endwhile