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Does this SubKey Exist ?

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Join Date: Oct 2008

Posts: 122

Reputation: Liszt is an unknown quantity at this point

Solved Threads: 6

Liszt

Offline

Junior Poster

Does this SubKey Exist ?

May 9th, 2009

How would it be possible to check if a subKey exist in the Classes root in Registry Editor. My attemt is like follows but my compiler doesn´t like it.

'Microsoft::Win32::RegistryKey' : class does not have a copy-constructor
no conversion from 'nullptr' to 'Microsoft::Win32::RegistryKey'

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
Microsoft::Win32::RegistryKey subKey1 = Microsoft::Win32::Registry::ClassesRoot->OpenSubKey("one\\two");
 
	 if( subKey1 != nullptr ) //Exists ?
	 {
                         //do something
	 }
Microsoft::Win32::RegistryKey subKey1 = Microsoft::Win32::Registry::ClassesRoot->OpenSubKey("one\\two");

	 if( subKey1 != nullptr ) //Exists ?
	 {
                         //do something
	 }

•

Join Date: Oct 2008

Posts: 122

Reputation: Liszt is an unknown quantity at this point

Solved Threads: 6

Liszt

Offline

Junior Poster

Re: Does this SubKey Exist ?

May 10th, 2009

This is working, found a solution.

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
RegistryKey^ rk;
rk = Registry::ClassesRoot->OpenSubKey("abc1\\asd123", true);
 
if (rk == nullptr)//key exist		
{
	 //Do Not Exists !!!
}
 
if (rk != nullptr) //key doesn't exist		
{
	 //Do Exists !!!
}
RegistryKey^ rk;
rk = Registry::ClassesRoot->OpenSubKey("abc1\\asd123", true);

if (rk == nullptr)//key exist		
{
	 //Do Not Exists !!!
}

if (rk != nullptr) //key doesn't exist		
{
	 //Do Exists !!!
}

•

Originally Posted by Liszt

How would it be possible to check if a subKey exist in the Classes root in Registry Editor. My attemt is like follows but my compiler doesn´t like it.

'Microsoft::Win32::RegistryKey' : class does not have a copy-constructor
no conversion from 'nullptr' to 'Microsoft::Win32::RegistryKey'
Help with Code Tags

C++ Syntax (Toggle Plain Text)
Microsoft::Win32::RegistryKey subKey1 = Microsoft::Win32::Registry::ClassesRoot->OpenSubKey("one\\two");
 
	 if( subKey1 != nullptr ) //Exists ?
	 {
                         //do something
	 }
Microsoft::Win32::RegistryKey subKey1 = Microsoft::Win32::Registry::ClassesRoot->OpenSubKey("one\\two"); if( subKey1 != nullptr ) //Exists ? { //do something }