Thread: Shellexecute help

here is the code:

Code:

#include <iostream>
#include <windows.h>
#include <stdlib.h>
#include <cstdlib>
#include <string>
#include <Shellapi.h>
using namespace std;
int main()
{
ShellExecute(m_hWnd,"open","C:\\p1.html",NULL,NULL,SW_SHOW);
cout << " HI" << endl;
system ("PAUSE");
return 0;
}

Here are the errors:

------ Build started: Project: videotest, Configuration: Debug Win32 ------
Compiling...
videotest.cpp
c:\documents and settings\hp_administrator\my documents\visual studio 2005\projects\videotest\videotest\videotest.cpp(10 ) : error C2065: 'm_hWnd' : undeclared identifier
Build log was saved at "file://c:\Documents and Settings\HP_Administrator\My Documents\Visual Studio 2005\Projects\videotest\videotest\Debug\BuildLog.h tm"
videotest - 1 error(s), 0 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

Thank You Very Much

m_hWnd is not declared.

Look again at the example you got that code from. There's more to it than just running the single line of code.

that is all that was there (it was a ***** website)

Thanks

Which site?

There is an example of ShellExecute in the FAQ on this site. I think it's the FAQ that is about running another program from inside your program.

I believe that example is from a program using MFC, since MFC's CWnd class has a member m_hWnd containing the class's HWND.
The first param for ShellExecute is the handle to a window. If you don't have any, pass NULL.

I am new to C++ and I do not understand what the toutorial is saying. Can someone please post code (that shows what header files are needed as well) that will open a html document that is on my c drive named p1.

Thank You

The docs say a lot:

Code:

HINSTANCE ShellExecute(HWND hwnd,
    LPCTSTR lpOperation,
    LPCTSTR lpFile,
    LPCTSTR lpParameters,
    LPCTSTR lpDirectory,
    INT nShowCmd
);

Prototype of Shellexecute.
First argument - handle to your window. If you don't have any, pass NULL.
Operation: passing "open" will open a document, file or whatever you specify.
File: the file you're trying to open.
Parameters: if you try to run an application, what parameters you want to pass to it.
Directory: Working directory.
Last param asks how you want to file to open - how the window is to open. SW_SHOWNORMAL opens it as normal and gives it focus.

So...

Code:

ShellExecute(NULL, _T("your_file_name_here"), NULL, NULL, NULL, SW_SHOWNORMAL);

Is an example of how to use it.

Code:

#include <iostream>
#include <windows.h>
#include <stdlib.h>
#include <cstdlib>
#include <string>
#include <Shellapi.h>
using namespace std;
int main()
{
	ShellExecute(NULL, _T("C:\\p1.html"), NULL, NULL, NULL, SW_SHOWNORMAL);	
	cout << " HI" << endl;
	system ("PAUSE");
	return 0;
}

------ Build started: Project: videotest, Configuration: Debug Win32 ------
Compiling...
videotest.cpp
c:\documents and settings\hp_administrator\my documents\visual studio 2005\projects\videotest\videotest\videotest.cpp(10 ) : error C3861: '_T': identifier not found
Build log was saved at "file://c:\Documents and Settings\HP_Administrator\My Documents\Visual Studio 2005\Projects\videotest\videotest\Debug\BuildLog.h tm"
videotest - 1 error(s), 0 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

Can someone help with this error.

Thanks

Does anyone know what is going on?

I don't know why _T isn't defined as it should be if Windows.h is included, but you could manually include tchar.h where it's defined.

The Program now compiles, but does not open the file. Here is the code:

Code:

#include <iostream>
#include <windows.h>
#include <stdlib.h>
#include <cstdlib>
#include <string>
#include <tchar.h>
#include <Shellapi.h>
using namespace std;
int main()
{
	ShellExecute(NULL, _T("C:\\p1.html"), NULL, NULL, NULL, SW_SHOWNORMAL);	
	cout << " HI" << endl;
	system ("PAUSE");
	return 0;
}

My fault. I showed faulty code.

Code:

ShellExecute(NULL, _T("open"), _T("C:\\p1.html"), NULL, NULL, SW_SHOWNORMAL);

Excellent, It now works. Thank You Very Much