C++ API Call help
 

Hi guys, long time no post. :/

I was wondering if someone would be kind enough to offer me the corresponding C++ code for the following VB API calls. It would be very much appreciated.

code:
Public Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long

Public Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long

Public Declare Function SendMessageA Lib "user32" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long

Public Declare Function SendMessageCDS Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As COPYDATASTRUCT) As Long

Public Declare Function PostMessage Lib "user32" Alias "PostMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long

Public Const WM_USER = &H400

Public Const WM_WA_IPC = WM_USER

Public Const WM_COPYDATA = &H4A

Public Const WM_COMMAND = &H111



Public hwnd_winamp As Long

Public hwnd_eq As Long

Public hwnd_playlist As Long

Public Const IPC_GETWND_EQ = 0

Public Const IPC_GETWND_PE = 1

Public Const IPC_GETWND = 260



Public Type COPYDATASTRUCT

        dwData As Long

        cbData As Long

        lpData As String

End Type

Would you also be able to show an example API call or two so I can port my code accordingly?

Thanks for any and all help! :)

For the functions just #include <windows.h>. Then use them directly e.g. as:

code:
LRESULT result = SendMessage(hWnd, uMsg, wParam, lParam);

The constants you listed (and also the struct I think) are defined in "wa_ipc.h" of the Winamp SDK, and the 3 global variables you'll have to make and assign to yourself. HtH

-Christian Larsen

I have the following code:

code:
HWND hwnd_winamp;



int FindWinamp() {

     //Find winamp window

     //Returns 1 if winamp is open, 0 if not

    hwnd_winamp = FindWindow("Winamp v1.x", 0);



    if (hwnd_winamp == 1) {

        return 1;

    } else {

        return 0;

    }

}

I'm getting an error with the if() statement that C++ cannot compare a pointer and an integer. How do I determine the value that hwnd_winamp points to? (I haven't coded C++ in a while so I'm a bit rusty).

Thanks in advance.

FindWindow returns the window handle not 1

do this:

code:
if(hwnd_winamp != NULL) // you got winamp window handle ok

Ah, thanks. It must return 1/True with VB.

Nope, eleet-2k2, FindWindow returns the handle of the window it just found or NULL if it didn't find anything.