problem with filling a char array in a windows GUI app.

ryver · #1 10-Aug-2006, 08:06

I'm working on a GUI for windows, for this I'm using the win32 API.
I have a dialog with a single textedit control, An Ok and Cancel button.

What I want is, that when I enter some text in the first control, it will appear in a messagebox. But for some reason it won't.

I've added the string variable result to see if the messagebox worked properly (which it does) and the variable dat to see if the while statement did it's job(iterate through the char array).

CPP / C++ / C Code:

case IDA_INVOER_NIEUWDATA: {
                int ret;
                ret = DialogBox(GetModuleHandle(NULL), 
                MAKEINTRESOURCE(IDB_DIALOG_AANTALNEWDATA), hwnd, NewdataProc);
                if(ret == IDOK){
                   char buf[80];
                   GetDlgItemText(hwnd,30001,buf,80);
                    int i = 0;
                    std::string result = "wyy";
                    std::string dat = "ert";
                    while(buf[i] != NULL) {
                        result = result + dat;
                        i++;
                        }
                    MessageBox(hwnd, result.c_str(), "Notice", MB_OK | MB_ICONINFORMATION);
                    }
                else if(ret == IDCANCEL){
                    break;
                }
                else if(ret == -1){
                    MessageBox(hwnd, "Dialoog mislukt!", "Error",MB_OK | MB_ICONINFORMATION);
                    break;
                    }
                break;

Well the iteration won't work because, quite probally because the char array is empty. But how can this array be empty? I did enter data in de textedit control and clicked "Ok".

outlaw98 · #2 13-Aug-2006, 09:22

Everything looks good except when you call GetDlgItemText() you are sending the parent window of the dialog box as an argument for the hwndDlg parameter. You need to find some way of getting the handle of the dialogbox window and sending that as an argument there.. A suggestion is getting it through the NewdataProc() window procedure somehow.. GL

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problem with filling a char array in a windows GUI app.

Re: problem with filling a char array in a windows GUI app.