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Customer question: detectan F10 keypress

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I received this question:

Is there any way to detect an F10 keypress in the KeyPress() event?

It looks like F10 is a system key of some sort (ALT?).

It’s similar to this post: How to hook command window keystrokes

I just modified the code a little to hook the WM_SYSKEYDOWN Notification for a particular form

* From C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\Include\winuser.h

#define GWL_WNDPROC (-4)

#define WM_KEYDOWN 0x0100

#define WM_KEYUP 0x0101

#define WM_CHAR 0x0102

#define WM_SYSKEYDOWN 0x0104

#define WM_SYSKEYUP 0x0105

#define WM_SYSCHAR 0x0106

PUBLIC oMyHook as MyHook

oMyHook=NEWOBJECT("MyHook")

oMyHook.show

DEFINE CLASS MyHook AS form

      dwOrigWindProc=0

      dwShNotify=0

      allowoutput=.f.

      left=300

      PROCEDURE init

            DECLARE integer GetWindowLong IN WIN32API ;

                  integer hWnd, ;

                  integer nIndex

            DECLARE integer CallWindowProc IN WIN32API ;

                  integer lpPrevWndFunc, ;

                  integer hWnd,integer Msg,;

                  integer wParam,;

                  integer lParam

            THIS.dwOrigWindProc =GetWindowLong(_VFP.HWnd,GWL_WNDPROC)

            cWind="Command"

            WDOCKABLE(cWind,.f.) && make Command window not dockable

            BINDEVENT(thisform.HWnd, WM_SYSKEYDOWN,this,"HandleMsg")

            BINDEVENT(thisform.HWnd, WM_SYSKEYUP,this,"HandleMsg")

            BINDEVENT(thisform.HWnd, WM_SYSCHAR,this,"HandleMsg")

      PROCEDURE HandleMsg(hWnd as Integer, msg as Integer, wParam as Integer, lParam as Integer)

            LOCAL nRetvalue

            nRetvalue=0

            ?PROGRAM(),msg,TRANSFORM(wParam,"@0x"),TRANSFORM(lParam,"@0x")," "

            DO case

            CASE lParam=WM_KEYDOWN

            CASE lParam=WM_KEYUP

            CASE lParam=WM_CHAR

            ENDCASE

            nRetvalue=CallWindowProc(this.dwOrigWindProc,hWnd,msg,wParam,lParam)

            RETURN nRetvalue

ENDDEFINE

Comments

  • Anonymous
    November 10, 2005
    We had that problem when we switched from DOS to windows. Since we never used F9 we simply did:
    on key label F10 Keyboard "{F9}" before the form runs. This redirects F10 which undoes the native menu command. Then we just put this code in the keypress method.

    if nKeyCode = -8 && F9 but now also F10
    <your Code>
    endif

    If you put this in the form keypress event be sure to set KeyPreview = .t.
  • Anonymous
    May 06, 2006
    The comment has been removed