Help me with GETMESSAGE

[nlhung]

Help me, Please!

I do not know why, when this command crash.

$ msg = DllStructCreate ('HWND hwnd; UINT message; WPARAM wParam; LPARAM lParam; DWORD time; ptr pt')

DllCall ('user32.dll', 'bool', 'GetMessageW', 'ptr', DllStructGetPtr ($ msg))

I want to get messages from the queue by an application, how? Please help me, I am very thankful!

[Richard Robertson]

http://msdn.microsoft.com/en-us/library/windows/desktop/ms644936%28v=vs.85%29.aspx

When you use DllCall, your parameters need to match this.

[nlhung]

Yes, I know. But type "LPMSG" in Window to AutoIt is What?

I think it's "ptr". And tagMsg in Window is

typedef struct tagMSG {

HWND hwnd;

UINT message;

WPARAM wParam;

LPARAM lParam;

DWORD time;

POINT pt;

} MSG, *PMSG, *LPMSG;

To AutoIt I write "$msg = DllStructCreate('HWND hwnd;UINT message;WPARAM wParam;LPARAM lParam;DWORD time;ptr pt')".

It true or false?

Thank, Richard Robertson!

[Richard Robertson]

Yes but you are missing parameters on GetMessage itself.

[nlhung]

Yes, I fix code into:

$msg = DllStructCreate('HWND hwnd;UINT message;WPARAM wParam;LPARAM lParam;DWORD time;ptr pt')

DllCall('user32.dll','bool','GetMessageW','ptr',DllStructGetPtr($msg),"HWND","0x000A0288","UINT","0x0100","UINT","0x0101")

It can not exit. What can I do to get the message?

[Richard Robertson]

When you say it can not exit, do you mean that it sits there until you kill the program?

Wait a minute, are you trying to read the message of another program? GetMessage only reads messages on the calling thread's windows. It never returns because you don't own the other window.

[nlhung]

oh. I don't know it. thank Richard Robertson!

[Greenhorn]

Hi,

as far as I know (and from my experiences) you can not create a message loop with GetMessage in AutoIt.

Because the main function of the AutoIt-Interpreter has already a message loop for the running thread.

If you still do it, AutoIt crashes or never stops running.

But you can call GetMessage sporadically, that's OK.

Regards

Greenhorn

[Richard Robertson]

You missed the point entirely. The OP wasn't creating a message loop, he was attempting to get messages for a window that belonged to another program.