Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win

x
?
Solved

problems with #define STRICT

Posted on 1998-11-04
1
Medium Priority
?
428 Views
Last Modified: 2013-12-03
Hi;

I have been working my way through Charles Petzold's book Programming Windows95 ( using C and the SDK ).

In a program I am building I found it necessary to "#define STRICT" to make the compiler accept an array of windproc pointers.  That worked fine, but code that previously compiled okay doesn't compile now.

The error message I get is:

MainProgram.obj : error LNK2001: unresolved external symbol "struct HFONT__ * __cdecl EzCreateFont(struct HDC__ *,char *,int,int,int,int)" (?EzCreateFont@@YAPAUHFONT__@@PAUHDC__@@PADHHHH@Z)

"Ezfont.h" & "Ezfont.cpp" ( originally named Ezfont.c ) is a file for selecting fonts in Win95 that Charles Petzold included in his book.

Is there a way I can still use "#define STRICT", still use Ezfont, and have everyone place nice?

The code for Ezfont is below:


*----------------------
   EZFONT.H header file
  ----------------------*/

HFONT EzCreateFont (HDC hdc, char * szFaceName, int iDeciPtHeight,
                    int iDeciPtWidth, int iAttributes, BOOL fLogRes) ;

#define EZ_ATTR_BOLD          1
#define EZ_ATTR_ITALIC        2
#define EZ_ATTR_UNDERLINE     4
#define EZ_ATTR_STRIKEOUT     8

/*---------------------------------------
   EZFONT.C -- Easy Font Creation
               (c) Charles Petzold, 1996
  ---------------------------------------*/


#include <windows.h>
#include <string.h>
#include <math.h>
#include "Ezfont.h"

HFONT EzCreateFont (HDC hdc, char * szFaceName, int iDeciPtHeight,
                    int iDeciPtWidth, int iAttributes, BOOL fLogRes)
     {
     FLOAT      cxDpi, cyDpi ;
     HFONT      hFont ;
     LOGFONT    lf ;
     POINT      pt ;
     TEXTMETRIC tm ;

     SaveDC (hdc) ;

     SetGraphicsMode (hdc, GM_ADVANCED) ;
     ModifyWorldTransform (hdc, NULL, MWT_IDENTITY) ;
     SetViewportOrgEx (hdc, 0, 0, NULL) ;
     SetWindowOrgEx   (hdc, 0, 0, NULL) ;

     if (fLogRes)
          {
          cxDpi = (FLOAT) GetDeviceCaps (hdc, LOGPIXELSX) ;
          cyDpi = (FLOAT) GetDeviceCaps (hdc, LOGPIXELSY) ;
          }
     else
          {
          cxDpi = (FLOAT) (25.4 * GetDeviceCaps (hdc, HORZRES) /
                                  GetDeviceCaps (hdc, HORZSIZE)) ;

          cyDpi = (FLOAT) (25.4 * GetDeviceCaps (hdc, VERTRES) /
                                  GetDeviceCaps (hdc, VERTSIZE)) ;
          }

     pt.x = (int) (iDeciPtWidth  * cxDpi / 72) ;
     pt.y = (int) (iDeciPtHeight * cyDpi / 72) ;

     DPtoLP (hdc, &pt, 1) ;

     lf.lfHeight         = - (int) (fabs (pt.y) / 10.0 + 0.5) ;
     lf.lfWidth          = 0 ;
     lf.lfEscapement     = 0 ;
     lf.lfOrientation    = 0 ;
     lf.lfWeight         = iAttributes & EZ_ATTR_BOLD      ? 700 : 0 ;
     lf.lfItalic         = iAttributes & EZ_ATTR_ITALIC    ?   1 : 0 ;
     lf.lfUnderline      = iAttributes & EZ_ATTR_UNDERLINE ?   1 : 0 ;
     lf.lfStrikeOut      = iAttributes & EZ_ATTR_STRIKEOUT ?   1 : 0 ;
     lf.lfCharSet        = 0 ;
     lf.lfOutPrecision   = 0 ;
     lf.lfClipPrecision  = 0 ;
     lf.lfQuality        = 0 ;
     lf.lfPitchAndFamily = 0 ;

     strcpy (lf.lfFaceName, szFaceName) ;

     hFont = CreateFontIndirect (&lf) ;

     if (iDeciPtWidth != 0)
          {
          hFont = (HFONT) SelectObject (hdc, hFont) ;

          GetTextMetrics (hdc, &tm) ;

          DeleteObject (SelectObject (hdc, hFont)) ;

          lf.lfWidth = (int) (tm.tmAveCharWidth *
                              fabs (pt.x) / fabs (pt.y) + 0.5) ;

          hFont = CreateFontIndirect (&lf) ;
          }

     RestoreDC (hdc, -1) ;

     return hFont ;
     }
0
Comment
Question by:anatta18
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 
LVL 86

Accepted Solution

by:
jkr earned 180 total points
ID: 1415740
Yes. Simply use

extern "C"
HFONT EzCreateFont (HDC hdc, char * szFaceName, int iDeciPtHeight,
                    int iDeciPtWidth, int iAttributes, BOOL fLogRes) ;

as the function prototype. Otherwise, the compiler will geneate C++ mangled names, which someties (as in your case) leads to linker problems.
0

Featured Post

Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Entering time in Microsoft Access can be difficult. An input mask often bothers users more than helping them and won't catch all typing errors. This article shows how to create a textbox for 24-hour time input with full validation politely catching …
SASS allows you to treat your CSS code in a more OOP way. Let's have a look on how you can structure your code in order for it to be easily maintained and reused.
Viewers will learn one way to get user input in Java. Introduce the Scanner object: Declare the variable that stores the user input: An example prompting the user for input: Methods you need to invoke in order to properly get  user input:
Viewers will learn about the regular for loop in Java and how to use it. Definition: Break the for loop down into 3 parts: Syntax when using for loops: Example using a for loop:
Suggested Courses

636 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question