Okay, I have tested it. And it should work. First I got Direct X Errors, but I have changed to bmp and it is working fine. Seems like it does not need the power of 2 with var mode 0. However thanks for support.

I never have panel bitmaps with power of two... but you can also try bmap_create instead of bmap_load, then you don't need to provde a bitmap to load into.