C / C++ / MFC

// do something with the retrieved values
cityInfo[i]["newval"] = to_string (i + 1);

cityInfo[4] = json::parse(R"({"t":"x", "l" : [0.0, 0.0, 0.0, 0.0] })");

Richard MacCutchan wrote:

And your message handlers could contain anything - we cannot see the code.

BOOL Dlg_OnInitDialog (HWND hwnd, HWND hwndFocus, LPARAM lParam)
{
	RECT rc;

	// Associate an icon with the dialog box.
	chSETDLGICONS(hwnd, IDI_DIRWALK, IDI_DIRWALK);
    
    // here is some code that I didn't got to, or have patience to write

	GetClientRect(hwnd, &rc);
	SetWindowPos(GetDlgItem(hwnd, IDC_TREE), NULL, 0, 0, rc.right, rc.bottom, SWP_NOZORDER);

	return(TRUE);
}

<pre lang="C++">

#define chINITSTRUCT(structure, fInitSize)                       \
        (ZeroMemory(&(structure), sizeof(structure)),             \
	fInitSize ? (*(int*) &(structure) = sizeof(structure)) : 0)

// Dialog Box Icon Setting Macro
// The call to SetClassLong is for Windows NT 3.51 or less.
// The WM_SETICON messages are for Windows NT 4.0 and Win 95
#define chSETDLGICONS(hwnd, idiLarge, idiSmall)                  \
		{                                                              \
		OSVERSIONINFO VerInfo;                                      \
		chINITSTRUCT(VerInfo, TRUE);                             \
		GetVersionEx(&VerInfo);                                  \
		if ((VerInfo.dwPlatformId == VER_PLATFORM_WIN32_NT) &&   \
			(VerInfo.dwMajorVersion <=3 &&                      \
			VerInfo.dwMinorVersion <= 51))                       \
		{                                                        \
			SetClassLong(hwnd, GCL_HICON, (LONG)                      \
				LoadIcon(GetWindowInstance(hwnd),                \
				MAKEINTRESOURCE(idiLarge)));                     \
		}                                                        \
		else                                                    \
		 {                                                       \
			 SendMessage(hwnd, WM_SETICON, TRUE, (LPARAM)        \
				 LoadIcon(GetWindowInstance(hwnd),                    \
				 MAKEINTRESOURCE(idiLarge)));                    \
			 SendMessage(hwnd, WM_SETICON, FALSE, (LPARAM)       \
				 LoadIcon(GetWindowInstance(hwnd),                    \
				 MAKEINTRESOURCE(idiSmall)));                    \
		}                                                        \
	}

coco243 wrote:

But the program dosen't reach the Dlg_OnInitDialog, I placed a breakpoint there.

#define chHANDLE_DLGMSG(hWnd, message, fn)                                         \
	case (message):                                                                \
return (SetDlgMsgResult(hwnd, uMsg, HANDLE_##message((hwnd),  (wParam), (lParam), (fn))))

INT_PTR CALLBACK DlgProc(
    HWND    hDlg,
    UINT    uMessage,
    WPARAM  wParam,
    LPARAM  lParam
)
{
    switch (uMessage)
    {
    case WM_INITDIALOG:
        return OnInitDialog(hDlg, (HWND)wParam, lParam); // calls the initialization function

    case WM_COMMAND:
        return OnCommand(hDlg, LOWORD(wParam), (HWND)lParam, HIWORD(wParam)); // handles any button etc. messages

    }

    return false; // default processing
}