C# has a DateTime structure to hold date and time value in a single variable. The following script will gives you first and last date of given months in two lines of C# code. Assuming that the first and last dates we're looking for is for current month (now), the code would be like this:

DateTime FirstDate = new DateTime(DateTime.Now.Year, DateTime.Now.Month, 1);
DateTime LastDate = FirstDate.AddMonths(1).AddDays(-1);

If you code an C# .NET application using axAcroPDFLib to generate a PDF document, shows it to the user, and found error message on your application at application closing like this (instruction and memory address may vary):

The instruction at "0x0700609c" referenced memory at "0x00000014". The memory could not be read

It was caused by Adobe Reader 9.x axAcroPDFLib bug. The axAcroPDF control doesn't disposed properly during form closing event.

If you are using Mozilla Firefox browser on the latest of Microsoft Windows OS, Windows 7, you may encounter File Access Error while downloading files using DownThemAll plugin. I am using Mozilla Firefox v3.5.4 with DownThemAll v1.1.7.

Registry Editing has been disabled by your administrator

Using many "heavy" application/services running at the same time may cause some application to "lock up" or "hang". You can end those application process directly by using Windows Task Manager. But somehow when you try to start the Windows Task Manager, you found the following error message:

Task Manager has been disabled by your administrator

This error is caused if the DisableTaskMgr restriction is enabled in the Registry. If Task Manager has been disabled without your knowledge, it may be a symptom of a virus. I strongly recommends that you update your antivirus definition and perform a complete scan of your system.

Cellular Emulator is included in Windows Mobile 6 Professional SDK Refresh. It is very useful if you currently developing an application which utilizes SMS and/or phone call features on the device. The Cellular Emulator can emulate making and receiving a call to Windows Mobile 6 device emulator, as well as sending and receiving SMS.

However, connecting the Cellular Emulator to Windows Mobile 6 Emulator is not so straight forward. It's not like just start the emulator and they automatically connected. It does require a little trick to make it works.

This tutorial will show you how to create a Hello World application for Windows Mobile 6. This tutorial purpose is to introduce Windows Mobile programming using Microsoft .NET Compact Framework (C#) and Windows Mobile 6 SDK Refresh.

For anyone who need to know about commands that shuts down, reboot, hibernate, log off, and/or locking the computer in Windows XP by executing it from Windows XP command prompt or 'console'. This command may be useful in task scheduling or making it programmable.