How to calculate ColWidth in millimeter?

Hi

to set ColWidth of a table i use

tbl.cols[0].aSet(WPAT_COLWIDTH, 600);

i want to get a ColWidth with 2 cm width, how to calculate cm into the WPAT_COLWIDTH value?

Ciao
Stefan

Thank you, i will use WPCentimeterToTwips

Ciao
Stefan