dev-cpp-users

[Dev-C++] Error compiling "file_one" from tutorials.

[Richard P. E. <ev...@ma...>]

This is from the Forger's Win32 API tutorials.  I tried to compile the example
"file_one" but in File_one.c I got the following error messages:

17 file_one.c
  warning: converting NULL to non-pointer type

25 file_one.c
  ANSI C++ forbids implicit conversion from `void *' in assignment

49 file_one.c
  warning: converting NULL to non-pointer type

57 file_one.c
  ANSI C++ forbids implicit conversion from `void *' in assignment

179 file_one.c
  warning: converting NULL to non-pointer type

0

Both have the following same line of code:

   pszText = GlobalAlloc(GPTR, dwTextLength + 1);

Can anyone tell me what went wrong?  Thank in advance.

Re: [Dev-C++] Error compiling "file_one" from tutorials.

[Nick <en...@ho...>]

Hello again,

> Hopefully that helped, otherwise feel free to post more of the 
> offending code, or a link if it's online.

Never mind about the link, I found it in the backtraffic. A couple of 
notes, there are some places in Forger's tutorial where NULL is 
used instead of 0 or other valid parameters in that code; particularly 
in CreateFile and .styles. Not the best practice in C, and error-
prone in C++. 

Here is a link describing proper use of CreateFile:
http://msdn.microsoft.com/library/default.asp?URL=/library/psdk/winbase/filesio_7wmd.htm

That should all be one line.

I would /strongly/ suggest finding Petzold's "Programming 
Windows" book if you are planning on doing Windows 
programming. You might even be able to find an earlier edition for 
cheap.
HTH
--
regards,

Nick