Question: what is loword and hiword?
Answer: LOWORD and HIWORD are macros. LOWORD gets the lower 16 bits of a 32 bit integer and HIWORD gets the upper 16 bits. the wParam and lParam give you information about a particular message. ... So to reiterate LOWORD and HIWORD are macros that return the lower 16 bits of higher 16 bits of a 32 bit lParam or wParam.