Ad:

C++ Discussion Thread
Unsolved
Views: 1695

Page 1
2
Next

You are currently viewing page 1 of this multi-page discussion thread

Sep 21st, 2009

ShellExecute() problem

Expand Post »

ok so i have used ShellExecute() before but with a specific value eg. "http://www.facebook.com" but now i want this program to be more flexible and allow the user to put the website he wants to.

the thing is i made a string like this

C++ Syntax (Toggle Plain Text)
String ^URL;
 
ShellExecute(NULL,"open",URL,NULL,NULL,SW_SHOWDEFAULT)
String ^URL;

ShellExecute(NULL,"open",URL,NULL,NULL,SW_SHOWDEFAULT)

this gives me an error saying cannot convert system::string into LPCSTR.

btw i am using windows forms applications, how can i fix this? D:

thnx

Similar Threads

I had problem with onmouse out in div in JavaScript / DHTML / AJAX
Using ShellExecute to open a file in a specific program? in Pascal and Delphi
Shellexecute problem in C++
Can you fix the problem in Visual Basic 4 / 5 / 6

evilguyme

Reputation Points: 10

Solved Threads: 0

Junior Poster in Training

Offline

70 posts
since Sep 2009

Permalink

Sep 21st, 2009

Re: ShellExecute() problem

Ok.
As you're using a std::string to store your URL and ShellExecute is expecting a pointer to a C style string (LPCSTR) as a parameter, you simply need to change your ShellExecute call to:

C++ Syntax (Toggle Plain Text)
ShellExecute(NULL,"open",URL.c_str(),NULL,NULL,SW_SHOWDEFAULT)
ShellExecute(NULL,"open",URL.c_str(),NULL,NULL,SW_SHOWDEFAULT)

The c_str() function of the standard library std::string class returns the contents of the string as a C style string...Which is exactly what ShellExecute is expecting as a parameter. That should fix your problem!

Cheers for now,
Jas.

Last edited by JasonHippy; Sep 21st, 2009 at 10:55 am.

JasonHippy

Reputation Points: 590

Solved Threads: 123

Practically a Master Poster

Offline

672 posts
since Jan 2009

Permalink

Sep 21st, 2009

Re: ShellExecute() problem

Click to Expand / Collapse Quote originally posted by JasonHippy ...

Ok.
As you're using a std::string

No, he is using managed C++.NET and the .NET String!!!

jencas

Reputation Points: 395

Solved Threads: 71

Posting Whiz

Offline

362 posts
since Dec 2007

Permalink

Sep 21st, 2009

Re: ShellExecute() problem

he's right, it's .NET string

which is

system::string...

need help plz :O

evilguyme

Reputation Points: 10

Solved Threads: 0

Junior Poster in Training

Offline

70 posts
since Sep 2009

Permalink

Sep 21st, 2009

Re: ShellExecute() problem

Ooops, I didn't notice that at the bottom of the post!

Hmm..It's been quite a while since I did any .NET stuff with C++.

I can't find any of my old managed code, but I know I've had to do similar conversions in the past. I think this may've been one of the ways I've used....

C++ Syntax (Toggle Plain Text)
String URL;
 
// some code.....Assume URL eventually gets populated with something!
 
// Create a CString to use as a parameter using URL....
CString urlParam(&URL); // don't forget to #include <atlstr.h>
 
// Above: If memory serves, from VS7 onwards CString can take a pointer to a system::String as a parameter in it's constructor when using the managed extensions... But I could be wrong!
 
// now call shellexecute passing the CString version of URL (urlParam)..
ShellExecute(NULL,"open",urlParam,NULL,NULL,SW_SHOWDEFAULT)
String URL;

// some code.....Assume URL eventually gets populated with something!

// Create a CString to use as a parameter using URL....
CString urlParam(&URL); // don't forget to #include <atlstr.h>
  
// Above: If memory serves, from VS7 onwards CString can take a pointer to a system::String as a parameter in it's constructor when using the managed extensions... But I could be wrong!

// now call shellexecute passing the CString version of URL (urlParam)..
ShellExecute(NULL,"open",urlParam,NULL,NULL,SW_SHOWDEFAULT)

Alternatively, try taking a look at the following article:
http://support.microsoft.com/?id=311259

Cheers for now,
Jas.

JasonHippy

Reputation Points: 590

Solved Threads: 123

Practically a Master Poster

Offline

672 posts
since Jan 2009

Permalink

Sep 21st, 2009

Re: ShellExecute() problem

thnx. lemme try that and get back to you

i keep getting :

C++ Syntax (Toggle Plain Text)
1>C:\Program Files\Microsoft Visual Studio 9.0\VC\atlmfc\include\atlconv.h(90) : error C3641: 'InterlockedExchangePointer' : invalid calling convention '__stdcall ' for function compiled with /clr:pure or /clr:safe
1>C:\Program Files\Microsoft Visual Studio 9.0\VC\atlmfc\include\atlconv.h(102) : error C3641: 'ATL::_AtlGetConversionACP' : invalid calling convention '__stdcall ' for function compiled with /clr:pure or /clr:safe
1>C:\Program Files\Microsoft Visual Studio 9.0\VC\atlmfc\include\atlconv.h(535) : error C3641: 'AtlA2WHelper' : invalid calling convention '__stdcall ' for function compiled with /clr:pure or /clr:safe
1>C:\Program Files\Microsoft Visual Studio 9.0\VC\atlmfc\include\atlconv.h(554) : error C3641: 'AtlW2AHelper' : invalid calling convention '__stdcall ' for function compiled with /clr:pure or /clr:safe
1>C:\Program Files\Microsoft Visual Studio 9.0\VC\atlmfc\include\atlconv.h(572) : error C3641: 'AtlA2WHelper' : invalid calling convention '__stdcall ' for function compiled with /clr:pure or /clr:safe
1>C:\Program Files\Microsoft Visual Studio 9.0\VC\atlmfc\include\atlconv.h(577) : error C3641: 'AtlW2AHelper' : invalid calling convention '__stdcall ' for function compiled with /clr:pure or /clr:safe
1>C:\Program Files\Microsoft Visual Studio 9.0\VC\atlmfc\include\atlconv.h(530) : error C3641: 'AtlDevModeW2A' : invalid calling convention '__stdcall ' for function compiled with /clr:pure or /clr:safe
1>C:\Program Files\Microsoft Visual Studio 9.0\VC\atlmfc\include\atltrace.h(65) : error C2440: 'default argument' : cannot convert from 'int (__cdecl *)(int,const char *,int,const char *,const char *,...)' to 'ATL::CTrace::fnCrtDbgReport_t'
1>        Address of a function yields __clrcall calling convention in /clr:pure and /clr:safe; consider using __clrcall in target type
1>C:\Program Files\Microsoft Visual Studio 9.0\VC\atlmfc\include\atltrace.h(146) : fatal error C1903: unable to recover from previous error(s); stopping compilation
1>C:\Program Files\Microsoft Visual Studio 9.0\VC\atlmfc\include\atlconv.h(90) : error C3641: 'InterlockedExchangePointer' : invalid calling convention '__stdcall ' for function compiled with /clr:pure or /clr:safe
1>C:\Program Files\Microsoft Visual Studio 9.0\VC\atlmfc\include\atlconv.h(102) : error C3641: 'ATL::_AtlGetConversionACP' : invalid calling convention '__stdcall ' for function compiled with /clr:pure or /clr:safe
1>C:\Program Files\Microsoft Visual Studio 9.0\VC\atlmfc\include\atlconv.h(535) : error C3641: 'AtlA2WHelper' : invalid calling convention '__stdcall ' for function compiled with /clr:pure or /clr:safe
1>C:\Program Files\Microsoft Visual Studio 9.0\VC\atlmfc\include\atlconv.h(554) : error C3641: 'AtlW2AHelper' : invalid calling convention '__stdcall ' for function compiled with /clr:pure or /clr:safe
1>C:\Program Files\Microsoft Visual Studio 9.0\VC\atlmfc\include\atlconv.h(572) : error C3641: 'AtlA2WHelper' : invalid calling convention '__stdcall ' for function compiled with /clr:pure or /clr:safe
1>C:\Program Files\Microsoft Visual Studio 9.0\VC\atlmfc\include\atlconv.h(577) : error C3641: 'AtlW2AHelper' : invalid calling convention '__stdcall ' for function compiled with /clr:pure or /clr:safe
1>C:\Program Files\Microsoft Visual Studio 9.0\VC\atlmfc\include\atlconv.h(530) : error C3641: 'AtlDevModeW2A' : invalid calling convention '__stdcall ' for function compiled with /clr:pure or /clr:safe
1>C:\Program Files\Microsoft Visual Studio 9.0\VC\atlmfc\include\atltrace.h(65) : error C2440: 'default argument' : cannot convert from 'int (__cdecl *)(int,const char *,int,const char *,const char *,...)' to 'ATL::CTrace::fnCrtDbgReport_t'
1>        Address of a function yields __clrcall calling convention in /clr:pure and /clr:safe; consider using __clrcall in target type
1>C:\Program Files\Microsoft Visual Studio 9.0\VC\atlmfc\include\atltrace.h(146) : fatal error C1903: unable to recover from previous error(s); stopping compilation

that error when this is my code...

C++ Syntax (Toggle Plain Text)
String ^siteURL1;
CString button1URL(&siteURL1);
 
ShellExecute(NULL,"open",button1URL,NULL,NULL,SW_SHOWDEFAULT);
String ^siteURL1;
CString button1URL(&siteURL1);

ShellExecute(NULL,"open",button1URL,NULL,NULL,SW_SHOWDEFAULT);

D: now im gna read that article..

Last edited by evilguyme; Sep 21st, 2009 at 4:03 pm.

evilguyme

Reputation Points: 10

Solved Threads: 0

Junior Poster in Training

Offline

70 posts
since Sep 2009

Permalink

Sep 22nd, 2009

Re: ShellExecute() problem

bump!

i really need help on this

evilguyme

Reputation Points: 10

Solved Threads: 0

Junior Poster in Training

Offline

70 posts
since Sep 2009

Permalink

Sep 22nd, 2009

Re: ShellExecute() problem

Here's a thread on the conversion. Can't test it because I don't use managed code.

Nick Evan

Moderator

Featured Poster

Reputation Points: 4142

Solved Threads: 394

Industrious Poster

Offline

4,132 posts
since Oct 2006

Permalink

Sep 22nd, 2009

Re: ShellExecute() problem

zomg thnx again

u've helped me a whole bunch.. mind PMing me ur MSN?

oooh i dun understand that whole thing cuz im still learning C++ from a book and was just making these programs to learn...

well the basic idea of that is to convert system::string to a char array yea?

if so then i can refer to that once i learn about char arrays.

Last edited by evilguyme; Sep 22nd, 2009 at 1:49 pm.

evilguyme

Reputation Points: 10

Solved Threads: 0

Junior Poster in Training

Offline

70 posts
since Sep 2009

Permalink

Sep 22nd, 2009

Re: ShellExecute() problem

Click to Expand / Collapse Quote originally posted by evilguyme ...

mind PMing me ur MSN?

Yes, actually I do mind. Keep the discussion in the forum.

Nick Evan

Moderator

Featured Poster

Reputation Points: 4142

Solved Threads: 394

Industrious Poster

Offline

4,132 posts
since Oct 2006

Page 1
2
Next

This thread is more than three months old

No one has posted to this discussion for at least three months. Please let old threads die and do not reply to them unless you feel you have something new and valuable to contribute that absolutely must be added to make the discussion complete. Otherwise, please start a new thread in this forum instead.

Previous Thread in C++ Forum Timeline: Need help with custom widget in QT

Next Thread in C++ Forum Timeline: .WAV data upsampling

DaniWeb Message

Cancel Changes

User Name
Password