[Dev-C++] Re:Help with dll

[Jasbir C. <cha...@ya...>]

I am trying to learn how to make dll in Dev-C++. My Program is as follows: 

#include <windows.h> 
#include <stdio.h> 
#include <string.h> 

#define DllExport extern "C" __declspec (dllexport) 


BOOL APIENTRY DllMain (HINSTANCE hInst, DWORD reason, 
LPVOID reserved /* Not used. */ ); 

/* DllMain Results: 
TRUE on success, FALSE on failure. */ 

BOOL APIENTRY 
DllMain ( 
HINSTANCE hInst /* Library instance handle. */ , 
DWORD reason /* Reason this function is being called. */ , 
LPVOID reserved /* Not used. */ ) 
{ 

switch (reason) 
{ 
case DLL_PROCESS_ATTACH: 
break; 

case DLL_PROCESS_DETACH: 
break; 

case DLL_THREAD_ATTACH: 
break; 

case DLL_THREAD_DETACH: 
break; 
} 
return TRUE; 
} 

DllExport void ShowMouseLoc(HDC hdc, LPARAM lParam) 
{ 
char str[80]; 

wsprintf(str, "Button is down at %d, %d", 
LOWORD(lParam), HIWORD(lParam)); 
TextOut(hdc, LOWORD(lParam), HIWORD(lParam), 
str, strlen(str)); 

} 

When I compile it gives me following linker errors: 

f:codelocalschildtswin98chap21 ewmydll.o(.text+0x93):mydll.cpp: undefined reference to `TextOutA@20' 
Warning: no export definition file provided 
dllwrap will create one, but may not be what you want 
F:DEV-C_~1BINdllwrap: gcc exited with status 1 


If I take out TextOut line it makes dll and lib file without any error? I don't know what I am doing wrong. I would like to know what more I have to insert in the program so that linker see the TextOut statement. 


Jasbir Chauhan 

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