0

the RegisterHotKey() is limited?
everytime that i create a button control the RegisterHotKey() id isn't the same.

//on constructor:
++ButtonCount;
altmessage=ButtonCount;

now the hotkey message:

case WM_HOTKEY:
            {
               if (wParam==inst->altmessage)
                {
                    SendMessage(inst->hwnd,WM_COMMAND,BN_CLICKED,lParam);
                }
            }
            break;

and now how i regist the hot key:

case WM_DRAWITEM:
            {
                DRAWITEMSTRUCT *test=(DRAWITEMSTRUCT*) lParam;
                UnregisterHotKey(inst->hwnd,inst->altmessage);
                RegisterHotKey(inst->hwnd,inst->altmessage,MOD_ALT,inst->altkey);

inst is the button object pointer.
the 1st button that it's created, the alt+altkey is working fine. but the 2nd button is ignored, why?

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Contributors
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Last Post by cambalinho
1

Why are you unregistering and registering the hotkey everytime the button is drawn? This looks like an owner drawn button but the question stands..

Votes + Comments
thanks for all
0

even so my problem was my own function for get the letter(from button caption). i was doing several errors without notice.
heres my function:

char GettingAltKey(string text)
{
    char altkey=-1;//defauld result
    int textlenght=text.length()-1;
    for(int i=0; i<textlenght;i++)
    {
        if((text[i]=='&') && (i<textlenght) && (text[i+1]!='&'))
        {
            altkey=upper((char)text[i+1]);
            break;
        }
        else if((text[i]=='&') && (i>0) && (text[i-1]!='&')  )
        {
            altkey=upper((char)text[i+1]);
            break;
        }
    }
    return altkey;
}

//button class constructor:
button(string caption="", HWND parent=WindowMain)
    {
        ++ButtonCount;
        if(caption=="")
            strCaption=strCaption + to_string(ButtonCount);
        else
            strCaption=caption;
        setParent(parent);//is where i create the button
        altkey=GettingAltKey(strCaption);
        if(altkey!=-1)
            RegisterHotKey(hwnd,altmessage,MOD_ALT,altkey);
    }

void setText(string text)
    {
        strCaption=text;
        if(altkey!=-1)
            UnregisterHotKey(hwnd,altmessage);
        altkey=GettingAltKey(strCaption);
        if(altkey!=-1)
            RegisterHotKey(hwnd,altmessage,MOD_ALT,altkey);
        InvalidateRect(hwnd,NULL,FALSE);
    }
~button()
    {
        --ButtonCount;
        if(altkey!=-1)
            UnregisterHotKey(hwnd,altmessage);
        DestroyCursor(hCursor);
        DestroyWindow(hwnd);
        hwnd = 0;
    }

now works fine.
thanks for all

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