In this article, i will teach you how to create a program that will change the system date of your computer. This tutorial is very helpful to your program or system having this integration.


So, now let's start this tutorial!

1. Let's start with creating a Windows Form Application for this tutorial by following the following steps in Microsoft Visual Studio 2010: Go to File, click New Project, and choose Windows Application.

2. Next, add one DateTimePicker and and one button. You must design your interface like this:



3. Import first the Runtime.InteropServices to access the DLL of the kernel32 in accessing the system date.

1. using
   
   System.Runtime.InteropServices
   
   ;
   

Now, use a structure that will have the variables for the reference of our DLL.

1. public
   
   struct
   
   SystemDate
   
2. {
   
3. public
   
   ushort
   
   Year;
   
4. public
   
   ushort
   
   Month;
   
5. public
   
   ushort
   
   DayOfWeek;
   
6. public
   
   ushort
   
   Day;
   
7. public
   
   ushort
   
   Hour;
   
8. public
   
   ushort
   
   Minute;
   
9. public
   
   ushort
   
   Second;
   
10. public
    
    ushort
    
    Millisecond;
    
11. }
    
    ;
    
12. 
    
13. import the DLL now,
    
14. <
    
    csharp>
    
15. [
    
    DllImport(
    
    "kernel32.dll"
    
    , EntryPoint =
    
    "SetSystemTime"
    
    , SetLastError =
    
    true
    
    )
    
    ]
    
16. public
    
    extern
    
    static
    
    bool
    
    Win32SetSystemTime(
    
    ref
    
    SystemDate sysDate)
    
    ;
    
17. }
    
    ;
    

then put this code in your button to change directly the system date.

1. private
   
   void
   
   button1_Click(
   
   object
   
   sender, EventArgs e)
   
2. {
   
3. SystemDate updatedTime =
   
   new
   
   SystemDate(
   
   )
   
   ;
   
4. updatedTime.
   
   Month
   
   =
   
   (
   
   ushort
   
   )
   
   dateTimePicker1.
   
   Value
   
   .
   
   Month
   
   ;
   
5. updatedTime.
   
   Day
   
   =
   
   (
   
   ushort
   
   )
   
   dateTimePicker1.
   
   Value
   
   .
   
   Day
   
   ;
   
6. updatedTime.
   
   Year
   
   =
   
   (
   
   ushort
   
   )
   
   dateTimePicker1.
   
   Value
   
   .
   
   Year
   
   ;
   
7. 
   
8. //this will update the date in your system date
   
9. Win32SetSystemTime(
   
   ref
   
   updatedTime)
   
   ;
   
10. 
    
11. 
    
12. MessageBox.
    
    Show
    
    (
    
    "The system date has changed!"
    
    , "Message"
    
    , MessageBoxButtons.
    
    OK
    
    , MessageBoxIcon.
    
    Information
    
    )
    
    ;
    
13. }
    

Done!

Output:


For more inquiries and need programmer for your thesis systems in any kind of programming languages, just contact my number below.

Best Regards,

Engr. Lyndon Bermoy
IT Instructor/System Developer/Android Developer/Freelance Programmer

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