标准c如何写dll

[zymoonstone]

我想在标准c下写个dll，可不知道格式，能否给点帮助。急，分不够在加！！！

[messagebox]

《Windows程序设计》

[yizhenfeng]

EDRLIB.H
/*--------------------------------------------------------------------------
EDRLIB.H header file
----------------------------------------------------------------------------*/

#ifdef __cplusplus
#define EXPORT extern "C" __declspec (dllexport)
#else
#define EXPORT __declspec (dllexport)
#endif

EXPORT BOOL CALLBACK EdrCenterTextA (HDC, PRECT, PCSTR) ;
EXPORT BOOL CALLBACK EdrCenterTextW (HDC, PRECT, PCWSTR) ;

#ifdef UNICODE
#define EdrCenterText EdrCenterTextW
#else
#define EdrCenterText EdrCenterTextA
#endif
EDRLIB.C
/*---------------------------------------------------------------------------
EDRLIB.C -- Easy Drawing Routine Library module
(c) Charles Petzold, 1998
-----------------------------------------------------------------------------*/
#include windows.h>
#include "edrlib.h"

int WINAPI DllMain ( HINSTANCE hInstance, DWORD fdwReason, PVOID pvReserved)
{
return TRUE ;
}

EXPORT BOOL CALLBACK EdrCenterTextA ( HDC hdc, PRECT prc, PCSTR pString)
{
int iLength ;
SIZE size ;

iLength = lstrlenA (pString) ;
GetTextExtentPoint32A (hdc, pString, iLength, &size) ;
return TextOutA (hdc,( prc->right - prc->left - size.cx) / 2,
( prc->bottom - prc->top - size.cy) / 2,
pString, iLength) ;
}

EXPORT BOOL CALLBACK EdrCenterTextW (HDC hdc, PRECT prc, PCWSTR pString)
{
int iLength ;
SIZE size ;

iLength = lstrlenW (pString) ;
GetTextExtentPoint32W (hdc, pString, iLength, &size) ;
return TextOutW (hdc, ( prc->right - prc->left - size.cx) / 2,
( prc->bottom - prc->top - size.cy) / 2,
pString, iLength) ;
}

[yizhenfeng]

EDRTEST.C
/*---------------------------------------------------------------------------
EDRTEST.C -- Program using EDRLIB dynamic-link library
(c) Charles Petzold, 1998
----------------------------------------------------------------------------*/

#include <windows.h>
#include "edrlib.h"

LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
PSTR szCmdLine, int iCmdShow)
{
static TCHAR szAppName[] = TEXT ("StrProg") ;
HWND hwnd ;
MSG msg ;
WNDCLASS wndclass ;

wndclass.style = CS_HREDRAW | CS_VREDRAW ;
wndclass.lpfnWndProc = WndProc ;
wndclass.cbClsExtra = 0 ;
wndclass.cbWndExtra = 0 ;
wndclass.hInstance = hInstance ;
wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION) ;
wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;
wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
wndclass.lpszMenuName = NULL ;
wndclass.lpszClassName = szAppName ;

if (!RegisterClass (&wndclass))
{
MessageBox ( NULL, TEXT ("This program requires Windows NT!"),
szAppName, MB_ICONERROR) ;
return 0 ;
}

hwnd = CreateWindow (szAppName, TEXT ("DLL Demonstration Program"),
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT,
CW_USEDEFAULT, CW_USEDEFAULT,
NULL, NULL, hInstance, NULL) ;

ShowWindow (hwnd, iCmdShow) ;
UpdateWindow (hwnd) ;

while (GetMessage (&msg, NULL, 0, 0))
{
TranslateMessage (&msg) ;
DispatchMessage (&msg) ;
}
return msg.wParam ;
}

LRESULT CALLBACK WndProc ( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
HDC hdc ;
PAINTSTRUCT ps ;
RECT rect ;

switch (message)
{
case WM_PAINT:
hdc = BeginPaint (hwnd, &ps) ;

GetClientRect (hwnd, &rect) ;

EdrCenterText ( hdc, &rect,
TEXT ("This string was displayed by a DLL")) ;

EndPaint (hwnd, &ps) ;
return 0 ;

case WM_DESTROY:
PostQuitMessage (0) ;
return 0 ;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}

[yxc2008]

帮你顶！

[Robin]

up!