ｗｉｎｄｏｗｓ程序报错提示，怎么改啊？
[code=C/C++][/code]
/*-----------------------
PRINT.C -- Common routines for Print1, Print2, and Print3
-----------------------*/
#include <windows.h>
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
BOOL PrintMyPage (HWND) ;
extern HINSTANCE hInst ;
extern TCHAR szAppName[] ;
extern TCHAR szCaption[] ;
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
PSTR szCmdLine, int iCmdShow)
{
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 ;
}
hInst = hInstance ;
hwnd = CreateWindow (szAppName, szCaption,
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 ;
}
void PageGDICalls (HDC hdcPrn, int cxPage, int cyPage)
{
static TCHAR szTextStr[] = TEXT ("Hello, Printer!") ;
Rectangle (hdcPrn, 0, 0, cxPage, cyPage) ;
MoveToEx (hdcPrn, 0, 0, NULL) ;
LineTo (hdcPrn, cxPage, cyPage) ;
MoveToEx (hdcPrn, cxPage, 0, NULL) ;
LineTo (hdcPrn, 0, cyPage) ;
SaveDC (hdcPrn) ;
SetMapMode (hdcPrn, MM_ISOTROPIC) ;
SetWindowExtEx (hdcPrn, 1000, 1000, NULL) ;
SetViewportExtEx (hdcPrn, cxPage / 2, -cyPage / 2, NULL) ;
SetViewportOrgEx (hdcPrn, cxPage / 2, cyPage / 2, NULL) ;
Ellipse (hdcPrn, -500, 500, 500, -500) ;
SetTextAlign (hdcPrn, TA_BASELINE | TA_CENTER) ;
TextOut (hdcPrn, 0, 0, szTextStr, lstrlen (szTextStr)) ;
RestoreDC (hdcPrn, -1) ;
}
LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
static int cxClient, cyClient ;
HDC hdc ;
HMENU hMenu ;
PAINTSTRUCT ps ;
switch (message)
{
case WM_CREATE:
hMenu = GetSystemMenu (hwnd, FALSE) ;
AppendMenu (hMenu, MF_SEPARATOR, 0, NULL) ;
AppendMenu (hMenu, 0, 1, TEXT ("&Print")) ;
return 0 ;
case WM_SIZE:
cxClient = LOWORD (lParam) ;
cyClient = HIWORD (lParam) ;
return 0 ;
case WM_SYSCOMMAND:
if (wParam == 1)
{
if (!PrintMyPage (hwnd))
MessageBox (hwnd, TEXT ("Could not print page!"),
szAppName, MB_OK | MB_ICONEXCLAMATION) ;
return 0 ;
}
break ;
case WM_PAINT :
hdc = BeginPaint (hwnd, &ps) ;
PageGDICalls (hdc, cxClient, cyClient) ;
EndPaint (hwnd, &ps) ;
return 0 ;
case WM_DESTROY :
PostQuitMessage (0) ;
return 0 ;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
｝
[color=#FF0000][/color]
报错提示：
1>ClCompile:
1> 图形和文字.cpp
1>图形和文字.obj : error LNK2001: 无法解析的外部符号 "wchar_t * szCaption" (?szCaption@@3PA_WA)
1>图形和文字.obj : error LNK2001: 无法解析的外部符号 "struct HINSTANCE__ * hInst" (?hInst@@3PAUHINSTANCE__@@A)
1>图形和文字.obj : error LNK2001: 无法解析的外部符号 "wchar_t * szAppName" (?szAppName@@3PA_WA)
1>图形和文字.obj : error LNK2019: 无法解析的外部符号 "int __cdecl PrintMyPage(struct HWND__ *)" (?PrintMyPage@@YAHPAUHWND__@@@Z)，该符号在函数 "long __stdcall WndProc(struct HWND__ *,unsigned int,unsigned int,long)" (?WndProc@@YGJPAUHWND__@@IIJ@Z) 中被引用
1>F:\CODE\MFC\13-打印图形和文字\Debug\13-打印图形和文字.exe : fatal error LNK1120: 4 个无法解析的外部命令
[解决办法]
代码不全啊
是手工敲的么？
光盘里有源码的吧
[解决办法]
extern HINSTANCE hInst ;
extern TCHAR szAppName[] ;
extern TCHAR szCaption[] ;
-------------------
你这些都是在哪里定义的？
[解决办法]
- C/C++ code
#include <windows.h>LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;BOOL PrintMyPage (HWND) ;HINSTANCE hInst ;TCHAR szAppName[] = TEXT("hello"); //TCHAR szCaption[] = TEXT("world"); // 初始化！！int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow){ 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 ; } hInst = hInstance ; hwnd = CreateWindow (szAppName, szCaption, 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 ;}void PageGDICalls (HDC hdcPrn, int cxPage, int cyPage){ static TCHAR szTextStr[] = TEXT ("Hello, Printer!") ; Rectangle (hdcPrn, 0, 0, cxPage, cyPage) ; MoveToEx (hdcPrn, 0, 0, NULL) ; LineTo (hdcPrn, cxPage, cyPage) ; MoveToEx (hdcPrn, cxPage, 0, NULL) ; LineTo (hdcPrn, 0, cyPage) ; SaveDC (hdcPrn) ; SetMapMode (hdcPrn, MM_ISOTROPIC) ; SetWindowExtEx (hdcPrn, 1000, 1000, NULL) ; SetViewportExtEx (hdcPrn, cxPage / 2, -cyPage / 2, NULL) ; SetViewportOrgEx (hdcPrn, cxPage / 2, cyPage / 2, NULL) ; Ellipse (hdcPrn, -500, 500, 500, -500) ; SetTextAlign (hdcPrn, TA_BASELINE | TA_CENTER) ; TextOut (hdcPrn, 0, 0, szTextStr, lstrlen (szTextStr)) ; RestoreDC (hdcPrn, -1) ;}LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam){ static int cxClient, cyClient ; HDC hdc ; HMENU hMenu ; PAINTSTRUCT ps ; switch (message) { case WM_CREATE: hMenu = GetSystemMenu (hwnd, FALSE) ; AppendMenu (hMenu, MF_SEPARATOR, 0, NULL) ; AppendMenu (hMenu, 0, 1, TEXT ("&Print")) ; return 0 ; case WM_SIZE: cxClient = LOWORD (lParam) ; cyClient = HIWORD (lParam) ; return 0 ; case WM_SYSCOMMAND: if (wParam == 1) { if (!PrintMyPage (hwnd)) MessageBox (hwnd, TEXT ("Could not print page!"), szAppName, MB_OK | MB_ICONEXCLAMATION) ; return 0 ; } break ; case WM_PAINT : hdc = BeginPaint (hwnd, &ps) ; PageGDICalls (hdc, cxClient, cyClient) ; EndPaint (hwnd, &ps) ; return 0 ; case WM_DESTROY : PostQuitMessage (0) ; return 0 ; } return DefWindowProc (hwnd, message, wParam, lParam) ;}// 这个方法你没有写。。。BOOL PrintMyPage (HWND hWnd){ return TRUE;}
[解决办法]
咦？原来关于win32的这几篇帖子都是楼主发的。。吼吼！在学windows程序设计？