LNK2001: unresolved external symbol

hello all,
I have just wrote an application that looks error free to me, but according to my MSVC 6.0 there is a linker error . here is my code, compiles 0 errors 0 warnings. also note that I am using stdafx for the precompiled header, and I have the following included in stdafx.h:

Code:

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

Code:

#include "stdafx.h"
#include "resource.h"

static BOOL CALLBACK DialogFunc(HWND hwndDlg, UINT msg, WPARAM wParam, LPARAM lParam);

int APIENTRY WinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPSTR     lpCmdLine,
                     int       nCmdShow)
{
 	WNDCLASS wc;
	INITCOMMONCONTROLSEX cc;

	memset(&wc, 0, sizeof(wc));
	wc.lpfnWndProc = DefDlgProc;
	wc.cbWndExtra = DLGWINDOWEXTRA;
	wc.hInstance = hInstance;
	wc.hCursor = LoadCursor(NULL, IDC_ARROW);
	wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
	wc.lpszClassName = "stringscan";
	RegisterClass(&wc);
	memset(&cc, 0, sizeof(cc));
	cc.dwSize = sizeof(cc);
	cc.dwICC = 0xffffffff;
	InitCommonControlsEx(&cc);

	return DialogBox(hInstance, MAKEINTRESOURCE(IDD_DIALOG), NULL, (DLGPROC)DialogFunc);
}

static int InitApp(HWND hDlg, WPARAM wParam, LPARAM lParam)
{
         /* initialize some controls with values here */
	return 1;
}

static BOOL CALLBACK DialogFunc(HWND hwndDlg, UINT msg, WPARAM wParam, LPARAM lParam)
{
	switch(msg) {
	case WM_INITDIALOG:
		InitApp(hwndDlg, wParam, lParam);
		return TRUE;
	case WM_COMMAND:
		switch(LOWORD(wParam)) {
		case IDC_BUTTON_SCAN:
			/* do some tests and call scan function */
			break;
		}
		case WM_CLOSE:
			EndDialog(hwndDlg, 0);
			return TRUE;
	}
	return FALSE;
}

the full error that I am getting is:

stringscan.obj : error LNK2001: unresolved external symbol __imp__InitCommonControlsEx@4 Release/stringscan.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe

stringscan.exe - 2 error(s), 0 warning(s)

according to it it has something to do with InitCommonControls? don't see what I am doing wrong there . could it have something to do with WIN32_LEAN_AND_MEAN defined in stdafx.h? somehow it might be excluding commctrl.h?

can anyone please help show me what is going wrong here? thanks in advance.

You need to link in comctl32.lib

Regards,
Brian

Try adding this:

Code:

#include <cstdlib>
#include <windows.h>
#include <commctrl.h>
#pragma comment (lib, "comtrl32.lib")

aha. thanks man!

edit: hehe, Joelito, typo:

Code:

#pragma comment(lib, "comctl32")

#pragma comment(lib, "comctl32")

I'd like to suggest that instead of doing this you actually use the project settings to link in libraries; you should, arguably, be doing this anyway. If however, you feel you must use #pragmas like this then could you at least consider doing it this way instead:

Code:

#if defined __MSC_VER
#pragma comment(lib, "comctl32")
#endif

I am suggesting this because both __MSC_VER and, more importantly, that #pragma is microsoft specific, so if you want anyone who may not be using a microsoft compiler to have any chance of compiling your code you will have to ensure their compiler never sees that #pragma - this, of course, is why it's arguably better to actually use your compiler's project settings to set libs etc. rather than contaminating your code with compiler specific stuff like this.