Hey There,
I have this line of code:
retVal = RegOpenKeyEx(HKEY_LOCAL_MACHINE,subKey,0,KEY_READ, &OpenKey);
and it produces this warning:
warning C4312: 'type cast' : conversion from 'DWORD' to 'HKEY'
of greater size
What can I do to have this warning be removed?
Thanks!
Jay
(patelj27b at gmail dot com) 7 1607
I have this line of code:
retVal = RegOpenKeyEx(HKEY_LOCAL_MACHINE,subKey,0,KEY_READ, &OpenKey);
and it produces this warning:
warning C4312: 'type cast' : conversion from 'DWORD' to 'HKEY'
of greater size
Hi,
what is the type of RetVal?
RegOpenKeyEx returns a long, not a HKEY. if retVal is a HKEY, that would be
the cause of the problem.
--
Kind regards,
Bruno van Dooren br**********************@hotmail.com
Remove only "_nos_pam"
Jay wrote:
Hey There,
I have this line of code:
retVal = RegOpenKeyEx(HKEY_LOCAL_MACHINE,subKey,0,KEY_READ, &OpenKey);
and it produces this warning:
warning C4312: 'type cast' : conversion from 'DWORD' to 'HKEY'
of greater size
What can I do to have this warning be removed?
Thanks!
Jay
(patelj27b at gmail dot com)
Jay:
You need to show us more code. What are the declared types of all the
variables in this line of code?
David Wilkinson
David Wilkinson wrote:
Jay wrote:
Hey There,
I have this line of code:
retVal = RegOpenKeyEx(HKEY_LOCAL_MACHINE,subKey,0,KEY_READ, &OpenKey);
and it produces this warning:
warning C4312: 'type cast' : conversion from 'DWORD' to 'HKEY'
of greater size
What can I do to have this warning be removed?
Thanks!
Jay
(patelj27b at gmail dot com)
Jay:
You need to show us more code. What are the declared types of all the
variables in this line of code?
David Wilkinson
Hey There,
retVal is declared as a long, subKey is a char [46], and OpenKey is
HKEY. I don't think these have anything to do with it, from what I can
tell it has to do with HKEY_LOCAL_MACHINE being a constant with an int
value, and needing to be of type "HKEY". Any ideas?
Thanks!
Jay
(patelj27b at gmail dot com)
retVal = RegOpenKeyEx(HKEY_LOCAL_MACHINE,subKey,0,KEY_READ, &OpenKey);
retVal is declared as a long, subKey is a char [46], and OpenKey is
HKEY. I don't think these have anything to do with it, from what I can
tell it has to do with HKEY_LOCAL_MACHINE being a constant with an int
value, and needing to be of type "HKEY". Any ideas?
If that is the case, then you can solve the problem with a simple explicit
typecast i think.
(INT_PTR)HKEY_LOCAL_MACHINE
Are you doing this on x64 perhaps?
Because otherwise a handle should be the same size as a DWORD on x386,
unless I am missing something obvious.
--
Kind regards,
Bruno van Dooren br**********************@hotmail.com
Remove only "_nos_pam"
Bruno van Dooren [MVP VC++] wrote:
retVal = RegOpenKeyEx(HKEY_LOCAL_MACHINE,subKey,0,KEY_READ, &OpenKey);
retVal is declared as a long, subKey is a char [46], and OpenKey is
HKEY. I don't think these have anything to do with it, from what I can
tell it has to do with HKEY_LOCAL_MACHINE being a constant with an int
value, and needing to be of type "HKEY". Any ideas?
If that is the case, then you can solve the problem with a simple explicit
typecast i think.
(INT_PTR)HKEY_LOCAL_MACHINE
Are you doing this on x64 perhaps?
Because otherwise a handle should be the same size as a DWORD on x386,
unless I am missing something obvious.
--
Kind regards,
Bruno van Dooren br**********************@hotmail.com
Remove only "_nos_pam"
Thanks for the input, but when I set the line to:
retVal =
RegOpenKeyEx((INT_PTR)HKEY_LOCAL_MACHINE,subKey,0, KEY_READ,&OpenKey);
I just get the error:
error C2664: 'RegOpenKeyExA' : cannot convert parameter 1 from
'INT_PTR' to 'HKEY'
Conversion from integral type to pointer type requires
reinterpret_cast, C-style cast or function-style cast
Is there something else I should do?
-Jay
(patelj27b at gmail dot com)
Thanks for the input, but when I set the line to:
retVal =
RegOpenKeyEx((INT_PTR)HKEY_LOCAL_MACHINE,subKey,0, KEY_READ,&OpenKey);
I just get the error:
error C2664: 'RegOpenKeyExA' : cannot convert parameter 1 from
'INT_PTR' to 'HKEY'
Conversion from integral type to pointer type requires
reinterpret_cast, C-style cast or function-style cast
Is there something else I should do?
D'oh.
That what you get when posting with a head full of snot.
Of course I meant
(HKEY)HKEY_LOCAL_MACHINE
But I just checked that constant, and it is defined like this:
(( HKEY ) (ULONG_PTR)((LONG)0x80000002) )
So I don't think the parameter is the problem.
To be sure, I just compiled this with /W4, and got no warnings.
char subKey[] = "test";
HKEY OpenKey;
DWORD retVal =
RegOpenKeyExA(HKEY_LOCAL_MACHINE,subKey,0,KEY_READ ,&OpenKey);
What version of VC++ are you using, and are you really sure that retVal is a
DWORD?
--
Kind regards,
Bruno van Dooren br**********************@hotmail.com
Remove only "_nos_pam"
Bruno van Dooren [MVP VC++] wrote:
Thanks for the input, but when I set the line to:
retVal =
RegOpenKeyEx((INT_PTR)HKEY_LOCAL_MACHINE,subKey,0, KEY_READ,&OpenKey);
I just get the error:
error C2664: 'RegOpenKeyExA' : cannot convert parameter 1 from
'INT_PTR' to 'HKEY'
Conversion from integral type to pointer type requires
reinterpret_cast, C-style cast or function-style cast
Is there something else I should do?
D'oh.
That what you get when posting with a head full of snot.
Of course I meant
(HKEY)HKEY_LOCAL_MACHINE
But I just checked that constant, and it is defined like this:
(( HKEY ) (ULONG_PTR)((LONG)0x80000002) )
So I don't think the parameter is the problem.
To be sure, I just compiled this with /W4, and got no warnings.
char subKey[] = "test";
HKEY OpenKey;
DWORD retVal =
RegOpenKeyExA(HKEY_LOCAL_MACHINE,subKey,0,KEY_READ ,&OpenKey);
What version of VC++ are you using, and are you really sure that retVal is a
DWORD?
--
Kind regards,
Bruno van Dooren br**********************@hotmail.com
Remove only "_nos_pam"
Mr. Van Dooren,
I am currently using Visual Studio 2003
-Jay
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