The routine gEnqLineWidth() and gEnqLineWidthPixel() returns the currently requested line width in current units or device units respectively. The default for the line width is either 0.2mm or the initial thickness for lines generated by the device. The line width may be changed by calling gSetLineWidth() or gSetLineWidthPixel()
The actual thickness of lines generated by the device can be enquired by calling gEnqSelectedPen(). If the device is limited in its ability to generate lines of a specified thickness, the value returned by gEnqSelectedPen() will almost certainly differ from the currently requested line width.
