Thread: Recieving Message

I am using MCI to play a sound but i need to know when its finnished so i can close it, so i added the notify flag, the msdn documentation says u need to handle the MM_MCINOTIFY message, how do u do this?

If you want to handle notification messages, you usually put it through WM_COMMAND message. You use a switch statement with HIWORD(wParam) or LOWORD(wParam).

example

Code:

case WM_COMMAND:

			switch(LOWORD(wParam))
			{
				case IDOK:
					SendDlgItemMessage(hwnd, IDC_LIST1, LB_RESETCONTENT, 0, 0);
				break;

			}


			switch(HIWORD(wParam))
			{
				char buffer[5];
				int index;

				case LBN_SELCHANGE:
				{
					index = SendDlgItemMessage(hwnd, IDC_LIST1, LB_GETCURSEL, 0, 0);
					SendDlgItemMessage(hwnd, IDC_LIST1, LB_GETTEXT, index, (LPARAM)buffer);
					SetDlgItemText(hwnd,IDC_EDIT1,buffer);
					switch(LOWORD(wParam))
					{
						case IDC_LIST1:
						{

							index = SendDlgItemMessage(hwnd, IDC_LIST1, LB_GETCURSEL, 0, 0);
							SendDlgItemMessage(hwnd, IDC_LIST1, LB_GETTEXT, index, (LPARAM)buffer);
							SetDlgItemText(hwnd,IDC_EDIT1,buffer);
						}
						break;

					}

				}
				break;
			}
		break;

>>f you want to handle notification messages, you usually put it through WM_COMMAND message.

Actually thats command msg's.

Notify msg's go thru the WM_NOTIFY or WM_PARENTNOTIFY handler.

Heres some code from MSDN for setting up the device to send the MM msg's.
The HWND you use will determine the dialog / window that gets the msg.

I could not find any ref to what type of msg, WM_COMMAND or WM_NOTIFY or just a simple MM_MCINOTIFY will be sent.

I suggest you write a simple handler, put a break point there and move the code until you get the msg. ie experiment

Unless someone else knows.........

Code:

MCI_DGV_PLAY_PARMS mciPlay; 
DWORD dwFlags; 
 
mciPlay.dwCallback = MAKELONG(hwnd, 0); // this dialog / windows callback will get the msg
dwFlags = MCI_NOTIFY; 
 
mciSendCommand(wMCIDeviceID, MCI_PLAY, dwFlags, (DWORD)(LPSTR)&mciPlay);

Where would the above switch statement go?

I suggest you write a simple handler

how do u do that?

i dont have a main message processing loop
what is it?

im making a dll but i dont have access to the main app that will be executing its functions, is there any other way to get this?

You could subclass a window in the target process to run your own window procedure, that way you can get the notifications. You'll have to force the .dll to load into the target process using CreateRemoteThread() and LoadLibrary() (complicated process), or using the registry option (slows computer down).

Does that sound like what you need?

that sounds like overkill to play a simple mp3 sound

are there any alternitive methods of playing mp3 files? perferably ones that dont require extra dlls and stuff on the clients machine.