[Win32 API] MSG Structure

Contain message information from a thread's message queue.

Syntax

typedef struct tagMSG {
  HWND   hwnd;
  UINT   message;
  WPARAM wParam;
  LPARAM lParam;
  DWORD  time;
  POINT  pt;
} MSG, *PMSG, *LPMSG;

Members

• hwnd : A handle to the window whose window procedure receives the message. This member is NULL when the message is a thread message.
• message : The message identifier.Applications can only use the low word; the high word is reserved by system.
• wParam : additional information about the message.The exact meaning depends on the value of the message member.
• lParam : additional information about the message.The exact meaning depends on the value of the message member.
• time : The time at which the message was posted.
• pt : The cursur position,in screen coordinates, when the message was posted.