Programming Forums > Application Development > C++

Robert Collins · Jun 23rd, 2005, 5:36 PM

Hi everyone.

This one may be a stickler.

I downloaded some sample source code from MSDN from the below link:

http://msdn.microsoft.com/library/en...asp?frame=true

The project 'BandObjs' is a simple example that demonstrates the implementation of the three types of band objects. These are Desk Bands, Explorer Bars and Communication Bands.

In the source code 'BandObjs.cpp' I encountered the following line:

(Toggle Plain Text)

hr = StringCchPrintfEx(szSubKey,                   
                       MAX_PATH,                   
                       ClsidEntries[i].szSubKey,  
                       szCLSID);

When I first compiled the project I got the following error:

error C2065: 'StringCchPrintfEx' : undeclared identifier.

So, since it wasn't included in the download I was able to find it in my Microsoft SDK\Include\strsafe.h file. So, I included this file in the project and recompiled it. After that I get the following error:

error C2660: 'StringCchPrintfExA' : function does not take 4 parameters

The definition of the function is given below:

(Toggle Plain Text)

STRSAFEAPI StringCchPrintfExA(char* pszDest,
                              size_t cchDest, 
                              char** ppszDestEnd, 
                              size_t* pcchRemaining, 
                              unsigned long dwFlags, 
                              const char* pszFormat, ...)

From what I can gather from reading the 'strsafe.h' file about the function it is a replacement for the 'sprintf()' function. As you can see the function takes 6 parameters while the implementation of it is only passes 4 parameters. I tried using NULLs as the last two parameters but that didn't work. I just got another compiler error message.

The problem that I am up against is that I don't know how to make it work. Does anyone know what I can do to the code so that I can get the desired results, either by changing the function definition or changing the function implementation?

The Dark · Jun 23rd, 2005, 9:46 PM

Google is your friend here - the first hit (of two) is the documentation of the function. Or you can click here

I think this is a typo in the sample code - it looks like it should be using the StringCchPrintf function, which matches the paremeters.

If you really want to use the StringCchPrintfEx function, I think what you want is to pass NULL as the third and fourth arguments to the function, and 0 as the fifth argument (the flags) so your call would be

(Toggle Plain Text)

hr = StringCchPrintfEx(szSubKey,                   
                       MAX_PATH,
                       NULL,
                       NULL,
                       0,
                       ClsidEntries[i].szSubKey,  
                       szCLSID);

Robert Collins · Jun 24th, 2005, 1:37 PM

Dark,

Thanks for the link. That helps alot about the function. Also, many more thanks for posting your version of using the function. I didn't understand it at first because you used 7 parameters instead of 6 but after reading more about the function at that link I think I got the drift.

BTW: your version works perfectly. Again, thanks for your response.

Jun 23rd, 2005, 5:36 PM	#1
Robert Collins Newbie Join Date: Jun 2005 Posts: 2 Rep Power: 0	Using StringCchPrintfEx() instead of sprintf() Hi everyone. This one may be a stickler. I downloaded some sample source code from MSDN from the below link: http://msdn.microsoft.com/library/en...asp?frame=true The project 'BandObjs' is a simple example that demonstrates the implementation of the three types of band objects. These are Desk Bands, Explorer Bars and Communication Bands. In the source code 'BandObjs.cpp' I encountered the following line: (Toggle Plain Text) hr = StringCchPrintfEx(szSubKey, MAX_PATH, ClsidEntries[i].szSubKey, szCLSID); hr = StringCchPrintfEx(szSubKey, MAX_PATH, ClsidEntries[i].szSubKey, szCLSID); When I first compiled the project I got the following error: error C2065: 'StringCchPrintfEx' : undeclared identifier. So, since it wasn't included in the download I was able to find it in my Microsoft SDK\Include\strsafe.h file. So, I included this file in the project and recompiled it. After that I get the following error: error C2660: 'StringCchPrintfExA' : function does not take 4 parameters The definition of the function is given below: (Toggle Plain Text) STRSAFEAPI StringCchPrintfExA(char* pszDest, size_t cchDest, char** ppszDestEnd, size_t* pcchRemaining, unsigned long dwFlags, const char* pszFormat, ...) STRSAFEAPI StringCchPrintfExA(char* pszDest, size_t cchDest, char** ppszDestEnd, size_t* pcchRemaining, unsigned long dwFlags, const char* pszFormat, ...) From what I can gather from reading the 'strsafe.h' file about the function it is a replacement for the 'sprintf()' function. As you can see the function takes 6 parameters while the implementation of it is only passes 4 parameters. I tried using NULLs as the last two parameters but that didn't work. I just got another compiler error message. The problem that I am up against is that I don't know how to make it work. Does anyone know what I can do to the code so that I can get the desired results, either by changing the function definition or changing the function implementation?

Jun 23rd, 2005, 9:46 PM	#2
The Dark Expert Programmer Join Date: Jun 2005 Posts: 894 Rep Power: 4	Google is your friend here - the first hit (of two) is the documentation of the function. Or you can click here I think this is a typo in the sample code - it looks like it should be using the StringCchPrintf function, which matches the paremeters. If you really want to use the StringCchPrintfEx function, I think what you want is to pass NULL as the third and fourth arguments to the function, and 0 as the fifth argument (the flags) so your call would be (Toggle Plain Text) hr = StringCchPrintfEx(szSubKey, MAX_PATH, NULL, NULL, 0, ClsidEntries[i].szSubKey, szCLSID); hr = StringCchPrintfEx(szSubKey, MAX_PATH, NULL, NULL, 0, ClsidEntries[i].szSubKey, szCLSID);

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Jun 24th, 2005, 1:37 PM	#3
Robert Collins Newbie Join Date: Jun 2005 Posts: 2 Rep Power: 0	Dark, Thanks for the link. That helps alot about the function. Also, many more thanks for posting your version of using the function. I didn't understand it at first because you used 7 parameters instead of 6 but after reading more about the function at that link I think I got the drift. BTW: your version works perfectly. Again, thanks for your response.

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Programming Forums > Application Development > C++

Using StringCchPrintfEx() instead of sprintf()