Setting DC resolution

Hi, I would like to create a screen device context with a specific resolution, say 300 dpi (I don't know if I am using the correct words, I just want the GetDeviceCaps( hDC, LOGPIXELSX ) method to return a value of 300). Is there a way to achieve? I read the particular resolution from the printer settings, but I can't directly use the printer DC, because I am subsequently creating a memory DC compatible with the original one and if the original is a printer DC, it causes some problems.

Any ideas?

Thanks in advance.

The resolution is a characteristic of a device, but it is not a parameter of a display context. Read a book about graphics under Windows, or see http://msdn2.microsoft.com/en-us/library/ms534859.aspx .

The resolution cannot be changed with an alteration of a DC. It can be changed (if I'm not wrong) by a call to a function of the device driver of your video card or your printer.

See also http://www.codeproject.com/gdi/screenresolution.asp