compiling a simple ShellExecute with C

[hkMicro]

Having problems compiling the following code in C USING CL.EXE
// shell.c LANGUAGE = .NET 2003
#include <iostream.h>
#include <windows.h>

int main()
{
SHELLEXECUTE(NULL, "open", "notepad.exe", NULL, NULL, SW_SHOWNORMAL);
RETURN 0;
}

Results:

C:\ > CL /EHs shell.c
....... Incremental Linker Version 6.00.8447
......
shell.obj : error LNK2001: unresolved external symbol __imp__ShellExecuteA@24
shell.exe : fatal error LNK1120: 1 unresolved externals
C:\>

I suppose the problem has to do with Unicode. but am not sure. Any help
appreciated.

Thanks,

Hank

 

[Mattias Sjögren]

SHELLEXECUTE(NULL, "open", "notepad.exe", NULL, NULL, SW_SHOWNORMAL);

The function is called ShellExecute, not SHELLEXECUTE.

C:\ > CL /EHs shell.c
...... Incremental Linker Version 6.00.8447
.....
shell.obj : error LNK2001: unresolved external symbol __imp__ShellExecuteA@24
shell.exe : fatal error LNK1120: 1 unresolved externals

Try adding

/link shell32.lib



Mattias

 

[hkMicro]

Try adding

/link shell32.lib

Thank you, Mattias. That definitely compiled and it works.

Just starting to use this C with the command line compiler. So, whenever the
Documentation says in the Function Information something like:
"Import Library : shell32.lib"
I need to tell the compiler to link against that library.

But I notice that if I eliminate the <windows.h> and replace it with
<shellapi.h>--the documentation says: " Header : shellapi.h"--I receive about
100 errors. But If I just include <windows.h> by itself alone (no
<iostream.h>)

This must be because I'm compiling on Windows? And need to include the
Windows headers?

Thanks,

Hank

 

[Ben Voigt [C++ MVP]]

Thank you, Mattias. That definitely compiled and it works.

Just starting to use this C with the command line compiler. So, whenever
the
Documentation says in the Function Information something like:
"Import Library : shell32.lib"
I need to tell the compiler to link against that library.

But I notice that if I eliminate the <windows.h> and replace it with
<shellapi.h>--the documentation says: " Header : shellapi.h"--I receive
about
100 errors. But If I just include <windows.h> by itself alone (no
<iostream.h>)

Most all Win32 functions should be brought in using windows.h regardless of
which header is listed on the documentation.

You may want to try to #define WINVER, _WIN32_WINNT, WIN32_LEAN_AND_MEAN and
STRICT to speed up compile times

See http://msdn2.microsoft.com/en-us/library/aa383745.aspx

 

[David Wilkinson]

Having problems compiling the following code in C USING CL.EXE
// shell.c LANGUAGE = .NET 2003
#include <iostream.h>
#include <windows.h>

int main()
{
SHELLEXECUTE(NULL, "open", "notepad.exe", NULL, NULL, SW_SHOWNORMAL);
RETURN 0;
}

Results:

C:\ > CL /EHs shell.c
...... Incremental Linker Version 6.00.8447
.....
shell.obj : error LNK2001: unresolved external symbol __imp__ShellExecuteA@24
shell.exe : fatal error LNK1120: 1 unresolved externals
C:\>

I suppose the problem has to do with Unicode. but am not sure. Any help
appreciated.

Hank:

Note that iostream (which you are not actually using) is C, not C++. And
<iostream.h> is an obsolete header (use <iostream>).

You are not really in the right group; use microsoft.public.vc.language
for questions that do not have to do with.NET.

 

[David Wilkinson]

Hank:

Note that iostream (which you are not actually using) is C, not C++. And
<iostream.h> is an obsolete header (use <iostream>).

You are not really in the right group; use microsoft.public.vc.language
for questions that do not have to do with.NET.

Of course I meant: iostream is C++, not C.

 

[Jeffrey Tan[MSFT]]

Hi Hank,

Yes, this is because <Windows.h> includes a lot of important(or must have)
windows header files, such as <windef.h>, <winbase.h> etc... These files
define must of the windows structures types, such as DWORD, BOOL etc..

So we'd better always include <windows.h> if you are programming Windows
SDK applications. Thanks.

Best regards,
Jeffrey Tan
Microsoft Online Community Support
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[Mihai N.]

<shellapi.h>--the documentation says: " Header : shellapi.h"--I receive
about
100 errors. But If I just include <windows.h> by itself alone (no
<iostream.h>)

Bad MSDN documentation.

For many functions they have something like
"Declared in Winuser.h, include Windows.h"
(see for example MessageBox at
http://msdn2.microsoft.com/en-us/library/ms645505.aspx)

Mihai

 

[Jeffrey Tan[MSFT]]

Hi Hank,

Have you reviewed all the replies to you? If you still need any help or
have any concern, please feel free to feedback, thanks.

Best regards,
Jeffrey Tan
Microsoft Online Community Support