What 's the problem?

Yes,you are right^_^ Thanks!

Hi Momer, Yes your method does the same thing. But it should be slightly slower because of the typeconversions. I have 1 and you have 3 :)

Hi! Bart, but what I use is this: public static ushort MAKEWORD(byte a, byte b) { return (ushort)((ushort)a | ((ushort)b << 8)); } can it do the right thing too?

Momer, I'm sorry. I made a mistake. This is the correct method. public static ushort MAKEWORD(byte a, byte b) { return (ushort)(a | (b << 8)); } I tested the function with 2 bytes initialised to 255. byte a = 255; byte b = 255; these two bytes are initialised to their maximum value. So the ushort(WORD) return value should be the maximum value of ushort(WORD) wich is 65535. And MAKEWORD(a, b) returned 65535 so it's perfect now :)

just make the return type of the method an ushort. ushort and UInt16 are the same. maximum values: ushort = 65535 UInt16 = 65535 so just copy this: public static ushort MAKEWORD(byte a, byte b) { return (ushort)a | ((ushort)b << 8); } Good luck :)