类型转换错误,请大家帮忙!
有一处错误就是填充窗口信息的时候wndclass.lpfnWndProc = myThread::WndProc;
总是说类型转换错误,请大家帮我看看,谢谢了!
/////////////////////////////////////////////////////////////////
//file:thread.h
//这是定义的一个myThread类
class myThread
{
public:
LRESULT WINAPI WndProc(HWND hwnd, // Handle to window
UINT uMsg, // message identifier
WPARAM wParam, // first message parameter
LPARAM lParam); // second message parameter
int WINAPI WinMain(HINSTANCE hInstance, // handle to current instance
HINSTANCE hPrevInstance, // handle to previous instance
LPSTR lpCmdLine, // command line
int nCmdShow);
DWORD WINAPI ThreadProc(LPVOID lParam); //thread process function.
protected:
HWND hwnd;
HANDLE hThread;
WNDCLASS wndclass;
MSG msg;
};
////////////////////////////////////////////////////////////////////////////////
//file:thread.cpp
//
#include <windows.h>
#include "thread.h"
int WINAPI myThread::WinMain(HINSTANCE hInstance, // handle to current instance
HINSTANCE hPrevInstance, // handle to previous instance
LPSTR lpCmdLine, // command line
int nCmdShow)
{
wndclass.style=CS_HREDRAW | CS_VREDRAW;
wndclass.lpfnWndProc = myThread::WndProc;
wndclass.cbClsExtra=0;
wndclass.cbWndExtra=0;
wndclass.hInstance=hInstance;
wndclass.hCursor=LoadCursor(NULL,IDC_ARROW);
wndclass.hIcon=LoadIcon(NULL,IDI_APPLICATION);
wndclass.hbrBackground=(HBRUSH) GetStockObject(LTGRAY_BRUSH);
wndclass.lpszClassName="SDK Window";
wndclass.lpszMenuName=NULL;
RegisterClass(&wndclass); // Register window class.
hwnd=CreateWindow("SDK Window",
"窗口程序",
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
NULL,
NULL,
hInstance,
NULL);
ShowWindow(hwnd,SW_SHOWNORMAL);
UpdateWindow(hwnd);
while(GetMessage(&msg,NULL,0,0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return 0;
}
LRESULT WINAPI WndProc(HWND hwnd, // Handle to window
UINT uMsg, // message identifier
WPARAM wParam, // first message parameter
LPARAM lParam)
{
switch(uMsg)
{
case WM_CHAR:
MessageBox(hwnd,"這是按點擊了鍵盤!","提示",MB_OK);
break;
case WM_LBUTTONDOWN:
MessageBox(hwnd,"點擊了鼠標左鍵!","提示",MB_OK);
break;
case WM_RBUTTONDOWN:
MessageBox(hwnd,"點擊了鼠標右鍵!","提示",MB_OK);
break;
case WM_CLOSE:
if(IDYES==MessageBox(hwnd,"是否要關閉該程式?","提示",MB_YESNO))
{
DestroyWindow(hwnd); //Destroy window.
}
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hwnd,uMsg,wParam,lParam);
}
return 0;
}
问题点数：50、回复次数：10Top
1 楼microyzy（人不在牛，分高就行；分不在高，人牛也行）回复于 2004-09-03 13:53:34 得分 20
你自己强行转一下：
wndclass.lpfnWndProc = (WNDPROC)myThread::WndProc;
还有声明：
static DWORD WINAPI ThreadProc(LPVOID lParam); //thread process function.
Top
2 楼mynamelj（风动,帆动,仁者心动）回复于 2004-09-03 13:56:47 得分 0
我强行转换过没有用的.Top
3 楼whiteclouds（无聊的coding生活）回复于 2004-09-03 13:57:01 得分 0
你把两个函数的实现代码换一下位置试试.Top
4 楼wangweixing2000（星(inspiration（灵感）)）回复于 2004-09-03 14:01:49 得分 0
他们两个的参数是否一致呢？Top
5 楼mynamelj（风动,帆动,仁者心动）回复于 2004-09-03 14:21:31 得分 0
你们俩位说的我都试过,还是那处错误!Top
6 楼sssoft（恒谦）回复于 2004-09-03 15:50:48 得分 20
这个函数在类里面定义成静态的
static LRESULT WINAPI WndProc(HWND hwnd......Top
7 楼sssoft（恒谦）回复于 2004-09-03 15:51:33 得分 0
窗口函数只能是静态的或者是全局的Top
8 楼mynamelj（风动,帆动,仁者心动）回复于 2004-09-03 17:25:07 得分 0
刚才那个问题解决了可是现在又出现:
LIBCD.lib(wincrt0.obj) : error LNK2001: unresolved external symbol _WinMain@16
Debug/Thread.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.
Creating browse info file...Top
9 楼modena（非云）回复于 2004-09-03 17:30:24 得分 0
http://community.csdn.net/Expert/topic/3310/3310705.xml?temp=.8573725Top
10 楼sssoft（恒谦）回复于 2004-09-03 17:48:20 得分 10
//你的程序里面没有WinMain函数，这是Win32必需的一个函数，是一个入口函数
//如果没有这个函数，你编译的击不是可执行文件也不是动态库
#include "stdafx.h"
int APIENTRY WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
// TODO: Place code here.
return 0;
}
class myThread
{
public:
static LRESULT WINAPI WndProc(HWND hwnd, // Handle to window
UINT uMsg, // message identifier
WPARAM wParam, // first message parameter
LPARAM lParam); // second message parameter
int WINAPI WinMain(HINSTANCE hInstance, // handle to current instance
HINSTANCE hPrevInstance, // handle to previous instance
LPSTR lpCmdLine, // command line
int nCmdShow);
static DWORD WINAPI ThreadProc(LPVOID lParam); //thread process function.
protected:
HWND hwnd;
HANDLE hThread;
WNDCLASS wndclass;
MSG msg;
};
int WINAPI myThread::WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
wndclass.style=CS_HREDRAW | CS_VREDRAW;
wndclass.lpfnWndProc =myThread::WndProc;
wndclass.cbClsExtra=0;
wndclass.cbWndExtra=0;
wndclass.hInstance=hInstance;
wndclass.hCursor=LoadCursor(NULL,IDC_ARROW);
wndclass.hIcon=LoadIcon(NULL,IDI_APPLICATION);
wndclass.hbrBackground=(HBRUSH) GetStockObject(LTGRAY_BRUSH);
wndclass.lpszClassName="SDK Window";
wndclass.lpszMenuName=NULL;
RegisterClass(&wndclass); // Register window class.
hwnd=CreateWindow("SDK Window",
"窗口程序",
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
NULL,
NULL,
hInstance,
NULL);
ShowWindow(hwnd,SW_SHOWNORMAL);
UpdateWindow(hwnd);
while(GetMessage(&msg,NULL,0,0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return 0;
}
LRESULT WINAPI myThread::WndProc(HWND hwnd, // Handle to window
UINT uMsg, // message identifier
WPARAM wParam, // first message parameter
LPARAM lParam)
{
switch(uMsg)
{
case WM_CHAR:
MessageBox(hwnd,"這是按點擊了鍵盤!","提示",MB_OK);
break;
case WM_LBUTTONDOWN:
MessageBox(hwnd,"點擊了鼠標左鍵!","提示",MB_OK);
break;
case WM_RBUTTONDOWN:
MessageBox(hwnd,"點擊了鼠標右鍵!","提示",MB_OK);
break;
case WM_CLOSE:
if(IDYES==MessageBox(hwnd,"是否要關閉該程式?","提示",MB_YESNO))
{
DestroyWindow(hwnd); //Destroy window.
}
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hwnd,uMsg,wParam,lParam);
}
return 0;
}
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