Sometimes, it is required to convert 1/100 inch to twips (twentieth of a point) or vice versa. As the amount of twips in an inch is dependend on the current screen resolution, you have to know this resolution value to convert it properly.

The Graphics object that is returned in the event arguments of the Paint event is able to help you in this case:

private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
    float DpiX = e.Graphics.DpiX;
    float DpiY = e.Graphics.DpiY;

1 inch = 1440 twips

Then 1440 / DpiX = TwipsPerPixel