Structures (or “structs” in C) allow you to group several related variables and treat them as one unit. They are a mechanism for extending the type system of the C language by introducing user-defined ...

I'm working in a 32 bit program that needs to send 32 and 64 bit data structures via SendMessage(). Code: typedef struct _HD_ITEMW { UINT mask; int cxy; LPWSTR pszText; // 8 bytes HBITMAP hbm; // 8 ...