listbox not populating correctly - c++

Question

This is my first posting here, i am trying to learn to program a win32 GUI in code blocks 12.11, but here is the problem,
I have got 2x list boxes on a dialog box window(IDC_LISTP > Personal Project Notes) and (IDC_LISTS > Shared Project Notes),
The (personal project notes) auto populates on the dialog been created, i can also get the (Shared project notes) to populate from the correct folder too(update shared).
The problem arises when i click the button(update personal) after clicking the(update shared ), it loads the contents of (shared project notes) into the(personal project notes) list box, even after using the clear button too, this still populates (the personal project notes) when clicking the (update personal)button,
how do i stop from this from happening???
please could someone help me resolve this problem, has i have been banging my head against a wall for days now,
This is the code i have been currently experimenting with, please excuse the messy code, as most of it is from examples that i have converted to suit my GUI.
additional posts http://forums.codeguru.com/showthread.php?540733-win32-listbox-not-populating-right with pics too
BOOL CALLBACK DlgProc(HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam){
switch(Message){
case WM_INITDIALOG:
CheckRadioButton(HWND (hwnd),IDRADIO, IDRADIO2, IDRADIO);
{
DlgDirList(HWND (ID_PROJECT_PROJECT_NOTES), pbuffer, IDC_LISTP, 0, DDL_EXCLUSIVE);
HWND hListBox = GetDlgItem(hwnd, IDC_LISTP);
SendMessage(hListBox, LB_DIR, 0, (LPARAM)("*.txt*"));
}
break;
case WM_COMMAND:
switch(LOWORD(wParam)){
case ID_UPDATEP:{
SendDlgItemMessage(HWND(hwnd), IDC_LISTP, LB_RESETCONTENT, 0, 0);
DlgDirList(HWND (ID_PROJECT_PROJECT_NOTES), pbuffer, IDC_LISTP, 0, DDL_EXCLUSIVE);
HWND hListBox = GetDlgItem(hwnd, IDC_LISTP);
SendMessage(hListBox, LB_DIR, 0, (LPARAM)("*.txt"));
}
break;
case ID_UPDATES:{
SendDlgItemMessage(HWND(hwnd), IDC_LISTS, LB_RESETCONTENT, 0, 0);
DlgDirList(HWND (ID_PROJECT_PROJECT_NOTES), sbuffer, IDC_LISTS, 0, DDL_EXCLUSIVE);
HWND hList = GetDlgItem(hwnd, IDC_LISTS);
SendMessage(hList, LB_DIR, 0, (LPARAM)("*.txt"));
}
break;
case IDCLEAR:
SendDlgItemMessage(HWND(hwnd), IDC_LISTP, LB_RESETCONTENT, 0, 0);
SendDlgItemMessage(HWND(hwnd), IDC_LISTS, LB_RESETCONTENT, 0, 0);
break;
case IDCREATE:{
DialogBox(GetModuleHandle(NULL), MAKEINTRESOURCE(IDPAD), NULL, DlgProc);
}
break;
case IDOK:
EndDialog(hwnd, IDOK);
break;
case IDCANCEL:
EndDialog(hwnd, IDCANCEL);
break;
}
break;
case WM_CLOSE:
EndDialog(hwnd, 0);
break;
default:
return FALSE;
}
return TRUE;
}

Answer 1

There are several things wrong with your code, take a look at the MSDN Docs for DlgDirList():
a) The first parameter to DlgDirList() needs to be the handle to the dialog box that contains the list box; there is no error checking in the code, I suspect that the call to DlgDirList() fails with an error
b) the docs say that DlgDirList sends the LB_RESETCONTENT and LB_DIR messages to the list box
So all you need to do is
int nResult;
nResult = DlgDirList(hwnd, pbuffer, IDC_LISTP, 0, 0);
TRACE("Filling P (ID %d) from %s: result = %d\n", IDC_LISTP, pbuffer, nResult);
nResult = DlgDirList(hwnd, sbuffer, IDC_LISTS, 0, 0);
TRACE("Filling S (ID %d) from %s: result = %d\n", IDC_LISTS, sbuffer, nResult);
Make sure that pbuffer and sbuffer each contain a path and a wildcard-string, like "C:\personal\*.txt" and "C:\shared\*.txt".
This link contains a sample of how to use DlgDirList.