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C-/C++-Quelltext

//Checkbox States

HWND    hCb1=NULL;
bool    cb1=TRUE;
int        state1;

HWND    hCb2=NULL;
bool    cb2=TRUE;
int        state2;

//Auszug aus dem DlgProc

switch(uMsg)
    {

    case WM_INITDIALOG:
            if(cb1==TRUE)
                CheckDlgButton(hWnd, IDC_CHECK1, BST_CHECKED);
            else if(cb1==FALSE)
                CheckDlgButton(hWnd, IDC_CHECK1, BST_UNCHECKED);
           
            if(cb2==TRUE)
                CheckDlgButton(hWnd, IDC_CHECK2, BST_CHECKED);
            else if(cb2==FALSE)
                CheckDlgButton(hWnd, IDC_CHECK2, BST_UNCHECKED);
           

        return TRUE;

    case WM_COMMAND:
        switch(LOWORD (wParam))
        {
        case IDC_CHECK1:
   
        //First get handle of checkbox by casting lParam to HWND

        hCb1 = (HWND)lParam;
        state1 = SendMessage(hCb1,BM_GETCHECK,0,0);

        if(state1 == BST_CHECKED)
        {
            //do something

            cb1=TRUE;
        }

        else if(state1 == BST_UNCHECKED)
        {
            //do something

            cb1=FALSE;
        }

        case IDC_CHECK2:
   
        //First get handle of checkbox by casting lParam to HWND

        hCb2 = (HWND)lParam;
        state2 = SendMessage(hCb2,BM_GETCHECK,0,0);

        if(state2 == BST_CHECKED)
        {
            //do something

            cb2=TRUE;
        }

        else if(state2 == BST_UNCHECKED)
        {
            //do something

            cb2=FALSE;
        }
        break;