Twips Per Pixel in .NET
Converting between 1/100 inch units and twips in .NET depends on the current display resolution. The Graphics object from the Paint event provides DpiX and DpiY values. Since one inch equals 1440 twips, dividing 1440 by the DPI gives the correct TwipsPerPixel conversion factor.
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
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