Errors including shellapi.h

**SkripT** · 1st May 2006, 15:02

Hi all, in my Qt application I need to call to ShellExecute so I have to include the file shellapi.h. the problem is that when I try to compile only including <shellapi.h> file it give me the errors shown in the image that I attach. Could somebody explain me what I'm doing wrong? Thanks.

**Dark_Tower** · 1st May 2006, 15:09

Try including the files "qt_windows.h" and "qtwindowdefs_win.h", too

**zlatko** · 1st May 2006, 15:09

It can contain many other declaration and headers so I dont think that you need it..

What about QProcess ?

**SkripT** · 1st May 2006, 15:27

Originally Posted by zlatko

It can contain many other declaration and headers so I dont think that you need it..

What about QProcess ?

Including the files that Dark_Tower comented has solved the errors mentioned. zlatko I need ShellExecute because I have to open a doument (PDF) with the default application from the system and everywhere I aked for how to do it, they syggested me to use ShellExecute... Now I've got some other strange errors. My code is the following:

Qt Code:

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if ((long)ShellExecute(0, QString("open").utf16(), pathDocument.utf16(), NULL, NULL, 
		SW_SHOWNORMAL) <= 32)
		QMessageBox::critical(this, "Pre-VisualitzaciÃ³", "Error opening file");

if ((long)ShellExecute(0, QString("open").utf16(), pathDocument.utf16(), NULL, NULL, 
		SW_SHOWNORMAL) <= 32)
		QMessageBox::critical(this, "Pre-VisualitzaciÃ³", "Error opening file");

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"pathDocument" contains the path to the PDF doc that I want to open. The compiling errors are shown in the new image that I attach

. Could somebody please explain me where's the mistake?

**SkripT** · 1st May 2006, 17:07

Any suggestions, plz?

**Chicken Blood Machine** · 1st May 2006, 17:08

Use ShellExecuteW() instead. It is the wide character version of the call.

**SkripT** · 1st May 2006, 17:36

Originally Posted by Chicken Blood Machine

Use ShellExecuteW() instead. It is the wide character version of the call.

thanks for the suggestion Chicken Blood Machine but it continues giving me the same weird errors

More suggestions, please?

**Chicken Blood Machine** · 1st May 2006, 17:55

Originally Posted by SkripT

thanks for the suggestion Chicken Blood Machine but it continues giving me the same weird errors

More suggestions, please?

Then try explicitly casting, e.g:

Qt Code:

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if ((long)ShellExecute(0, 0, reinterpret_cast<WCHAR*>(pathDocument.utf16()), 0, 0, SW_SHOWNORMAL) <= 32)
    QMessageBox::critical(this, "Pre-VisualitzaciÃ³", "Error opening file");

if ((long)ShellExecute(0, 0, reinterpret_cast<WCHAR*>(pathDocument.utf16()), 0, 0, SW_SHOWNORMAL) <= 32)
    QMessageBox::critical(this, "Pre-VisualitzaciÃ³", "Error opening file");

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p.s. You don't need the second argument. You can leave it as NULL

**SkripT** · 1st May 2006, 18:13

Finally works!!!!! Thanks Chicken Blood Machine one more time. The only think that I needed to change from your version was reinterpret_cast<WCHAR*> for reinterpret_cast<const WCHAR*> because QString::utf16 returns a const ushort*.