anione can help me to find documents to learn making and compiling gauge in C++?I have FS SDK but i don't know how can i compile the sample files...my problem is including jpg file in dll(.gauge)file.....thank you all

It's not possible (at least it does make no sense) to include JPEGs into a gauge. Only Bitmaps, either 8 or 24 bit, are supported.

ok,how can i do this?

Hello Mario.Check on Avsim, but I believe you will have to go to flightsim.com and download sd2gau13 or sd2gau14.zipThis is a 100 page tutorial on making gauges, and you will find the answer you look for, plus thousands more, in there.