c++ 线程问题(用的是vs2010，win32程序)

[qq769018000]

//以下传递给线程函数的参数
typedef struct tagMYDATA
{
HWND hWnd;
HWND hRich;
char szName[256];
}MYDATA,* LPMYDATA;

//以下是线程
unsigned int _stdcall MyScan::fnPortScan(LPVOID lpVoid)
{
LPMYOPTION myOption;
myOption = (LPMYOPTION)lpVoid;

TCHAR szHwnd[256];
wsprintf(szHwnd,TEXT("%d"),(HWND)myOption->hWnd); //我想得到这个句柄，在这里会和传来的参数不一样。
MessageBox(NULL,szHwnd,TEXT("句柄"),NULL); //例如：我在fnThread(HWND hWnd)函数中传个
//窗口句柄， 在这里值就会不一样
return 0;
}

//以下是调用线程
void fnThread(HWND hWnd)
{
HANDLE hThread; //线程句柄
DWORD m_ThreadId; //线程ID

LPMYDATA myData;
myOption->hWnd =hWnd;

hThread = (HANDLE)_beginthreadex(NULL,0,(unsigned int(_stdcall *)(void *))fnPortScan,(LPVOID)myData,
0,(unsigned int *)&m_ThreadId);

if(hThread)
CloseHandle(hThread);
}

[feilongjilei]

//以下是调用线程
void fnThread(HWND hWnd)
{
HANDLE hThread; //线程句柄
DWORD m_ThreadId; //线程ID

// LPMYDATA myData; // 没有分配空间
LPMYDATA myData = new MYDATA();myData->hWnd =hWnd;

hThread = (HANDLE)_beginthreadex(NULL,0,(unsigned int(_stdcall *)(void *))fnPortScan,(LPVOID)myData,
0,(unsigned int *)&m_ThreadId);

if(hThread)
CloseHandle(hThread);
}

[至善者善之敌]

看是不结构体LPMYOPTION 参数在其他线程中被改变了

[genio]

这里myOption->hWnd =hWnd;是不是应该是myData->hWnd

[qq769018000]

呵呵，不好意思复制粘贴没粘贴好，

结构变量，都是 myData;

问题修改后，重发一遍。

//以下传递给线程函数的参数
typedef struct tagMYDATA
{
HWND hWnd;
HWND hRich;
char szName[256];
}MYDATA,* LPMYDATA;

//以下是线程
unsigned int _stdcall MyScan::fnData(LPVOID lpVoid)
{
LPMYDATA myData;
myOption = (LPMYOPTION)lpVoid;

TCHAR szHwnd[256];
wsprintf(szHwnd,TEXT("%d"),(HWND)myData->hWnd); //我想得到这个句柄，在这里会和传来的参数不一样。
MessageBox(NULL,szHwnd,TEXT("句柄"),NULL); //例如：我在fnThread(HWND hWnd)函数中传个
//窗口句柄， 在这里值就会不一样
return 0;
}

//以下是调用线程
void fnThread(HWND hWnd)
{
HANDLE hThread; //线程句柄
DWORD m_ThreadId; //线程ID

LPMYDATA myData;
myData->hWnd =hWnd;

hThread = (HANDLE)_beginthreadex(NULL,0,(unsigned int(_stdcall *)(void *))fnPortScan,(LPVOID)myData,
0,(unsigned int *)&m_ThreadId);

if(hThread)
CloseHandle(hThread);
}

[jackyjkchen]

LPMYDATA myData;这一句没分配内存

应该是
MYDATA myData;
myOption。hWnd =hWnd;

hThread = (HANDLE)_beginthreadex(NULL,0,(unsigned int(_stdcall *)(void *))fnPortScan,&myData,
0,(unsigned int *)&m_ThreadId);

线程内部相应也要修改

[qq769018000]

我调试时在线程函数内部，结构myData设置断点，调试时出现下面错误：
hWnd CXX0030: 错误: 无法计算表达式的值
[color=#FF0000]hRich CXX0030: 错误: 无法计算表达式的值 [/color]

[qq769018000]

好久没上了，谢谢，feilongjilei分给你了