XProfan

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This will usually over The Message WM_NCHITTEST geregelt.

here time one small example for a skalier / verschiebbaren Button. ought to itself well for a Window adjust let.
Compile Mark Separation

 $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

Window:

Julian57 (22.09.11)

The View source with wm_ncHitTest functions really super! thanks Andreas

Compile Mark Separation

 $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

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

while 1

    waitinput 30
    case iskey(27) : end

endwhile