Hi everyone. I'm having trouble getting groups working in a list box.I'm trying to have two groups. One will be "Done", and the other will be "todo". I'm getting these errors:

In function `LRESULT WindowProcedure(HWND__*, UINT, WPARAM, LPARAM)':
`ListView_EnableGroupView' undeclared (first use this function)
(Each undeclared identifier is reported only once for each function it appears in.)
`LVGROUP' undeclared (first use this function)
expected `;' before "lg"
`lg' undeclared (first use this function)
`LVGF_HEADER' undeclared (first use this function)
`LVGF_GROUPID' undeclared (first use this function)
`ListView_InsertGroup' undeclared (first use this function)
[Build Error] [main.o] Error 1

Could someone please help.
This is my code:

#define _WIN32_ 0x600

#include <windows.h>
#include <commctrl.h>
#include "resource.h"
HWND hWndButton;
HWND hWndEditBox;
HFONT hFont;
HWND hWnd; 
HWND hWndListView;
LVCOLUMN LvCol; // Make Coluom struct for ListView

/*  Declare Windows procedure  */
LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM);

/*  Make the class name into a global variable  */
char szClassName[ ] = "WindowsApp";

int WINAPI WinMain (HINSTANCE hThisInstance,
                    HINSTANCE hPrevInstance,
                    LPSTR lpszArgument,
                    int nFunsterStil)

{
            
    MSG messages;            /* Here messages to the application are saved */
    WNDCLASSEX wincl;        /* Data structure for the windowclass */

    /* The Window structure */
    wincl.hInstance = hThisInstance;
    wincl.lpszClassName = szClassName;
    wincl.lpfnWndProc = WindowProcedure;      /* This function is called by windows */
    wincl.style = CS_DBLCLKS;                 /* Catch double-clicks */
    wincl.cbSize = sizeof (WNDCLASSEX);

    /* Use default icon and mouse-pointer */
    wincl.hIcon = LoadIcon (NULL, IDI_APPLICATION);
    wincl.hIconSm = LoadIcon (NULL, IDI_APPLICATION);
    wincl.hCursor = LoadCursor (NULL, IDC_ARROW);
    wincl.lpszMenuName = NULL;                 /* No menu */
    wincl.cbClsExtra = 0;                      /* No extra bytes after the window class */
    wincl.cbWndExtra = 0;                      /* structure or the window instance */
    /* Use Windows's default color as the background of the window */
    wincl.hbrBackground = (HBRUSH) COLOR_BACKGROUND;

    /* Register the window class, and if it fails quit the program */
    if (!RegisterClassEx (&wincl))
        return 0;

    /* The class is registered, let's create the program*/
    hWnd = CreateWindowEx (
           0,                   /* Extended possibilites for variation */
           szClassName,         /* Classname */
           "To-do list",       /* Title Text */
           WS_SYSMENU | WS_MINIMIZEBOX , /* default window */
           CW_USEDEFAULT,       /* Windows decides the position */
           CW_USEDEFAULT,       /* where the window ends up on the screen */
           340,                 /* The programs width */
           210,                 /* and height in pixels */
           HWND_DESKTOP,        /* The window is a child-window to desktop */
           NULL,                /* No menu */
           hThisInstance,       /* Program Instance handler */
           NULL                 /* No Window Creation data */
           );

    /* Make the window visible on the screen */
    ShowWindow (hWnd, nFunsterStil);

    /* Run the message loop. It will run until GetMessage() returns 0 */
    while (GetMessage (&messages, NULL, 0, 0))
    {
        /* Translate virtual-key messages into character messages */
        TranslateMessage(&messages);
        /* Send message to WindowProcedure */
        DispatchMessage(&messages);
    }

    /* The program return-value is 0 - The value that PostQuitMessage() gave */
    return messages.wParam;
}


/*  This function is called by the Windows function DispatchMessage()  */

LRESULT CALLBACK WindowProcedure (HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message)                  /* handle the messages */
    {
        case WM_CREATE:
             {
             HINSTANCE hInstance = (HINSTANCE) GetWindowLong(hWnd, GWL_HINSTANCE) ;
            hWndButton = CreateWindowEx(
            0,
            "BUTTON",
            "ADD",
            WS_VISIBLE | WS_CHILD,
            250,
            0,
            90,
            20,
            hWnd,
            (HMENU) IDB_BUTTON,
            hInstance,
            NULL);
             hFont = CreateFont(0, 0, 0, 0, 0, FALSE, FALSE, FALSE, ANSI_CHARSET, OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS, DEFAULT_QUALITY, FF_MODERN, "Courier New");
             hWndEditBox = CreateWindow(
            "EDIT", 
            "", 
            WS_VISIBLE | WS_CHILD | ES_AUTOHSCROLL,
            0, 
            0, 
            250, 
            20, 
            hWnd, 
            (HMENU)IDC_EDITBOX_TEXT, 
            (HINSTANCE)GetWindowLong(hWnd, GWL_HINSTANCE), 
            NULL);
            SendMessage(hWndEditBox, WM_SETFONT, (WPARAM)hFont, TRUE);
         
            
             hWndListView = CreateWindowEx(0L, WC_LISTVIEW, "", WS_VISIBLE | WS_CHILD | LVS_REPORT,
                          0, 21, 340, 190, hWnd, 
                          (HMENU) ID_LISTVIEW, hInstance, NULL);
                 //Groups
   ListView_EnableGroupView(hWndListView, TRUE);                       
LVGROUP lg;
lg.cbSize = sizeof(LVGROUP);
lg.mask = LVGF_HEADER | LVGF_GROUPID;

lg.pszHeader = L"To-do";
lg.iGroupId = 101;
ListView_InsertGroup(hWndListView, -1, &lg);

lg.pszHeader = L"Done";
lg.iGroupId = 102;
ListView_InsertGroup(hWndListView, -1, &lg);
              // Here we put the info on the Coulom headers
				// this is not data, only name of each header we like
                memset(&LvCol,0,sizeof(LvCol)); // Reset Coluom
				LvCol.mask=LVCF_TEXT|LVCF_WIDTH|LVCF_SUBITEM; // Type of mask
				LvCol.cx=0x0;                                // width between each coloum
				LvCol.pszText="Time";                     // First Header
 				LvCol.cx=0x28;

				// Inserting Couloms as much as we want
				SendMessage(hWndListView,LVM_INSERTCOLUMN,0,(LPARAM)&LvCol); // Insert/Show the coloum
			
                LvCol.cx=0x125;
				LvCol.pszText="Item";                       
                SendMessage(hWndListView,LVM_INSERTCOLUMN,2,(LPARAM)&LvCol); 
				

               

                          
                          
                          
                          }
                          
            
             break;
        case WM_DESTROY:
                     
            PostQuitMessage (0);       /* send a WM_QUIT to the message queue */
            break;
            case WM_COMMAND: 
        {
            switch (LOWORD(wParam))
            {
                case IDB_BUTTON:
                {
                    switch (HIWORD(wParam))
                    {
                        case BN_CLICKED:
                            
int TxtSize = GetWindowTextLength (hWndEditBox) + 1;
char *Entry = new char [TxtSize];
GetWindowText (hWndEditBox, Entry, TxtSize);
MessageBox (hWnd, Entry, "", MB_OK | MB_ICONINFORMATION);
delete[] Entry;
                        break; 
                    }
                }
                break;
            }
            return 0;
        } 
        break; 
        default:                      /* for messages that we don't deal with */
            return DefWindowProc (hWnd, message, wParam, lParam);
        
    }

    return 0;
}

where did you declare and code ListView_InsertGroup() ? It is not in any win32 api function that I know of so it has to be in your code someplace.

try defining this at the top of your program. The macro compiles ok with VC++ 2005 Express but may not with other compilers. It only works on XP and Vista.

#define _WIN32_WINNT  0x501

Thanks, but it's still not working (same error). I'm using dev c++ in case it helps.

I used Dev-C++, created a Windows program then added that macro and it compiled without a problem. Just had to include commctrl.h header file.

#include <windows.h>
#include <commctrl.h>
<snip>

ListView_InsertGroup(0,0,0);
<snip>

define the following in your souce code before including commctrl.h
#define _WIN32_WINNT 0x600
and it should work - maybe.

It's often even better to set this definition in your compiler options.

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