The PTR format is the native pointer format under OS/2. Note that the Windows cursor format is significantly different from OS/2's pointer format. Thus it is very important that you choose the right format when you save pointers.
The default extension is PTR.
Supporting Platforms and Applications
Intel machines running OS/2
PMView is able to read all types of OS/2 pointers; The old "Pointer" and the new "Color Pointer" format can be read.