Class: Win::Gui::Message::Msg

Inherits:

FFI::Struct

show all

Overview

The MSG structure contains message information from a thread’s message queue.

typedef struct

HWND hwnd;
UINT message;
WPARAM wParam;
LPARAM lParam;
DWORD time;
POINT pt;

MSG, *PMSG;

hwnd: Handle to the window whose window procedure receives the message. NULL when the message is a thread message.
message: Message identifier. Apps can only use the low word; the high word is reserved by the system.
wParam: Additional info about the message. Exact meaning depends on the value of the message member.
lParam: Additional info about the message. Exact meaning depends on the value of the message member.
time: Specifies the time at which the message was posted.
pt: POINT structure - the cursor position, in screen coordinates, when the message was posted. (in my definition, it is changed to two longs: x, y - has the same effect, just avoid nested structs)