Dpi

[Kordzik]

I need to make some calculations from milimetres to pixels in my programme (for drawing) and I need a Dots-per-inch current value for this. Where can I get it? Supposedly in the WMI:) but isn't there a class which handles this in standard libraries by any chance? (It would even better if DirectDraw objects could perform drawing operations using milimetres coordinates, but I highly doubt it can be made:)

[Christian Graus]

I thought GDI+ allowed you to set drawing units as inches ? Christian Graus - Microsoft MVP - C++

[Sebrell]

You can indeed set drawing units as inches (System.Drawing.GraphicsUnit.Point is 1/72 inch). Plus, you can get the DPI values from the System.Drawing.Graphics.DpiX and DpiY properties.

[gaby2r]

you can use the folowing function to make calculations and transformations betwin different coordonating spaces Graphics.TransformPoints