Error C2664: 'GetVolumeInformationW' : cannot convert parameter 1 from 'const char [4]' to 'LPCWSTR'

[J_E_D_I]

Hi, I've written a program in c++ (using DLL) which uses the function below to show the HDD Serial No (as assigned by Windows). The program works fine in DLL mode but when I try to convert it into a Static Library Visual Studio 205 returns this error. Could anybody help please? Many thanks // Gets HDD serial No char volumeName[MAX_PATH]; DWORD volumeSerialNumber; DWORD maxNameLength; DWORD fileSystemFlags; char systemName[MAX_PATH]; // get the volume information for drive C GetHDDserialNo = GetVolumeInformation("c:\\", volumeName, MAX_PATH, &volumeSerialNumber, &maxNameLength, &fileSystemFlags, systemName, MAX_PATH);

[Rajesh R Subramanian]

Try this code:

TCHAR volumeName\[MAX\_PATH\];
DWORD volumeSerialNumber;
DWORD maxNameLength;
DWORD fileSystemFlags;
TCHAR systemName\[MAX\_PATH\];

// get the volume information for drive C
GetHDDserialNo = GetVolumeInformation(\_T("c:\\\\"),
	volumeName, MAX\_PATH,
	&volumeSerialNumber,
	&maxNameLength,
	&fileSystemFlags,
	systemName, MAX\_PATH); 

Nobody can give you wiser advice than yourself. - Cicero .·´¯`·->Rajesh<-·´¯`·. Codeproject.com: Visual C++ MVP

[J_E_D_I]

An absolute Genius! Thank you so much. But why is that?

[Cedric Moonen]

Because you have UNICODE enabled, so a lot of functions from the Win32 API expect strings in UNICODE and not in ANSI. I suggest you search for articles on that subject here on codeproject, it is a bit broad to explain in one single post.

Cédric Moonen Software developer
Charting control [v1.3]

[Rajesh R Subramanian]

Hontesly no genius. Trust me, it is a simple thing. Read on Generic text mappings.

Nobody can give you wiser advice than yourself. - Cicero .·´¯`·->Rajesh<-·´¯`·. Codeproject.com: Visual C++ MVP

[CPallini]

Rajesh R Subramanian wrote:

Hontesly no genius.

Actually, you are a genius. Only geniuses swap not adjacent characters in a word the way you did. :laugh:

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke

[Rajesh R Subramanian]

Yuo wlil nto msis oen signle cahnce to mcok at me, wlil oyu? :laugh:

Nobody can give you wiser advice than yourself. - Cicero .·´¯`·->Rajesh<-·´¯`·. Codeproject.com: Visual C++ MVP

[CPallini]

Oh no, you reverted to common-man adjacent characters swapping! :sigh: :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke

[Rajesh R Subramanian]

Probably this[^] would give you an idea why such swapping happens while I type. :)

Nobody can give you wiser advice than yourself. - Cicero .·´¯`·->Rajesh<-·´¯`·. Codeproject.com: Visual C++ MVP

[J_E_D_I]

Well, thanks to both of you for the explanations anyway. It solved the problem.

[Michael Dunn]

Start here: The Complete Guide to C++ Strings, Part I - Win32 Character Encodings[^]

--Mike-- Visual C++ MVP :cool: LINKS~! CP SearchBar v3.0 | C++ Forum FAQ I work for Keyser Söze

[J_E_D_I]

Thanks!