Back to the .NET Framework version 1.0, the requirement to enable Windows XP Visual Style in a Windows Forms Application was a little dull, adding a xml manifest file into the application resources (opening the assembly from VS.NET). Now in .NET Framework version 1.1, you just need to call the static method Application.EnableVisualStyles just before calling the method Application.Run in your Main method:
static void Main()
{
Application.EnableVisualStyles();
Application.Run(new frmMainForm());
}
You also need to change the standard flat sytle of all the Button controls in your form to FlatSytle.System:
btnSubmit.FlatStyle = System.Windows.Forms.FlatStyle.System;
Of course, you need any Windows XP version or above.