System messages

Macros
#define	MSG_IDLE   0x0142
	Indicates the system enters idle loop. More...
#define	MSG_TIMER   0x0144
	Indicates a timer has expired. More...
#define	MSG_FDEVENT   0x0146
	Indicates an event of registered file descriptor occurred. More...
#define	MSG_SRVNOTIFY   0x0147
	Indicates a notification from the server of MiniGUI-Processes. More...
#define	MSG_DOESNEEDIME   0x0150
	Sends to a window to query whether the window needs to open IME window. More...

Detailed Description

Macro Definition Documentation

#define MSG_DOESNEEDIME   0x0150

Sends to a window to query whether the window needs to open IME window.

The system will send this message when the window gain the input focus to determine whether the window needs to open IME window.

The application should handle this message and return TRUE when the window need IME window. Default window procedure returns FALSE.

Note

This is an asynchronical message.

Definition at line 2094 of file window.h.

#define MSG_FDEVENT   0x0146

Indicates an event of registered file descriptor occurred.

You can use RegisterListenFD to register a file desciptor to MiniGUI-Processes for listening.

When there is a read/write/except event on the fd, MiniGUI will post a MSG_FDEVENT message with wParam being equal to MAKELONG (fd, type), and the lParam being set to be the context to the target window.

MSG_FDEVENT
int fd = LOWORD(wParam);
int type = HIWORD(wParam);
void* context = (void*)lParam;

Parameters

fd	The listened file descriptor.
type	The event type.
context	A context value.

Note

Only available on MiniGUI-Processes.

See also

RegisterListenFD

Definition at line 2058 of file window.h.

#define MSG_IDLE   0x0142

Indicates the system enters idle loop.

This message is sent to the all main windows when the system enters idle loop.

Definition at line 2006 of file window.h.

#define MSG_SRVNOTIFY   0x0147

Indicates a notification from the server of MiniGUI-Processes.

This message will be broadcasted to all of the main windows in a client process when the client receives a MSG_SRVNOTIFY message from the server.

The server, i.e. 'mginit' defines the meaning of two parameters of this message.

Note

Only available on MiniGUI-Processes.

Definition at line 2073 of file window.h.

#define MSG_TIMER   0x0144

Indicates a timer has expired.

This message is sent to the window when a timer expired.

MSG_TIMER
int timer_id = (int)wParam;
DWORD tick_count = (DWORD)lParam;

Parameters

timer_id	The identifier of the timer has expired.
tick_count	The tick count when the timer had expired.

Definition at line 2025 of file window.h.