FindWindow and PostMessage compile problems

[poicito]

I am a total newbie at VC++ (I am a pathetic, lowly VB programmer). I am creating a program in VC++ to send some information via PostMessage to a program called MacroExpress (to tell it to run a specific macro, etc). When compiling, I get the postmessagea "function does not take 4 parameters" although postmessage does take 4.

Here's what I've got. If anyone could show me how this code would look when corrected, I would much appreciate it. Like I said, I'm a total newby, so explaining won't help as much as posting the same code in working order

There's probably a number of problems with it.

void CAboutDlg::OnButton1()
{

LPCTSTR S;
S = "TESTMACRO";
CWnd *pWnd = FindWindow( NULL , "Macro Express Player" );
HWND hWnd = pWnd->GetSafeHwnd();
int tt;
tt = WM_USER + 20;

int slen;
slen = strlen(S);

for (int x=0;x<slen;x++)
PostMessage(hWnd,tt,S[x],0);
PostMessage(hWnd,tt,0,0);
return;
}


That code causes compile errors for both postmessage lines:

error C2660: 'PostMessageA' : function does not take 4 parameters
error C2660: 'PostMessageA' : function does not take 4 parameters

Anyone who helps out will be much appreciated.

 

[obislavu]

As you wrote the code you are calling CWnd:ostMessage() which expects only 3 parameters.
To work your code :
:ostMessage(hWnd,tt,S[x],0);
-obislavu-

 

[poicito]

THANKS!!! That worked. The working code looks like this:

void CAboutDlg::OnButton1()
{

LPCTSTR S;
S = &quot;TESTMACRO&quot;;
CWnd *pWnd = FindWindow( NULL , &quot;Macro Express Player&quot; );
HWND hWnd = pWnd->GetSafeHwnd();
int tt;
tt = WM_USER + 20;

int slen;
slen = strlen(S);

for (int x=0;x<slen;x++)
:ostMessage(hWnd,tt,S[x],0);
:ostMessage(hWnd,tt,0,0);
return;
}

 

[poicito]

One more question. I put that same code into a DLL and it gives me a error C2440: 'initializing' : cannot convert from 'struct HWND__ *' to 'class CWnd *' error

Here's what I'm putting in:

int _stdcall MacexGo(LPCTSTR S)
{

CWnd *pWnd = FindWindow( NULL , &quot;Macro Express Player&quot; );
HWND hWnd = pWnd->GetSafeHwnd();

int tt;
tt = WM_USER + 20;

int slen;
slen = strlen(S);

for (int i=0;i<slen;i++)
:ostMessage(hWnd,tt,S,0);
:ostMessage(hWnd,tt,0,0);
return 0;

}


and I get the following error about the findwindow line:

error C2440: 'initializing' : cannot convert from 'struct HWND__ *' to 'class CWnd *'

It's weird that it would work in the EXE but not in a DLL. Any ideas?

Again, code example would help me more than explaination, as I am a total newbie.

 

[poicito]

Sorry about the first postmessage line and the italics. In my code the S is followed by a [ i ], but on this site, that creates italics.