Data type error when converting an old WinAPI C++ code as a new VS 2022 C++ project

Hi all.

I'm trying to write this code from an old WinAPI C++ book (code snippet Image at the bottom) into a new C++ project. What it does is create a clone process. But when i code it into VS 2022, I get the error:

Code:

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"Argument of type "TCHAR *" is incompatible with parameter of type "char *" "

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at line-17 (sprintf, 1st arg, below code). What's causing this please? And how to fix it?

Attachment 16512

VS 2022

Attachment 16513

VC 6.0

A couple of things.

1. In modern C++, you should use this in place of include <stdio.h>
#include <cstdio>

2. When dealing with anything TCHAR, you need to be aware of the "Generic-Text Routine Mappings"
_scprintf, _scprintf_l, _scwprintf, _scwprintf_l | Microsoft Learn

Back in VC6 days, TCHAR was just char, so it was easy to be lazy and use the ISO standard name for the function.

Quote:

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Originally Posted by Salem

A couple of things.

1. In modern C++, you should use this in place of include <stdio.h>
#include <cstdio>

2. When dealing with anything TCHAR, you need to be aware of the "Generic-Text Routine Mappings"
_scprintf, _scprintf_l, _scwprintf, _scwprintf_l | Microsoft Learn

Back in VC6 days, TCHAR was just char, so it was easy to be lazy and use the ISO standard name for the function.

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Thanks that helped. Sorry, been with C# for last the decade, I lost my touch with C++. Thought to relearn.

Anyways, when I did this, i got the error:

Code:

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const variable "szCommandLine" requires an initializer

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Code:

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const char szCommandLine[MAX_PATH];
 _scprintf(szCommandLine, "\"%s\" %d", szfilename, nCloneID);

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And by the way, where can I find out how to properly call the old API functions (back in VC6 days) now in VS 2022? Maybe kinda like a guide for people who're returning to C++?, if there's such a thing.

Thanks

Why would you be declaring it const, if you intend to modify it with the sprintf?

Quote:

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Originally Posted by Salem

Why would you be declaring it const, if you intend to modify it with the sprintf?

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My mistake!