#pragma pack(1)

struct Student {

char ID[10];

TCHAR Name[20];

UINT Age;

UINT Grade;

char Room[5];

char Tel[12];

};

#pragma pack()

//**********************************************************

因為需要在接收方的OnCopyData()函式中區分發送的兩種不同型別資料。所以就定義了以下兩個常量:

#define STRING 1

#define STUDENT 2

傳送方:

void CSendDataDlg::OnBtSend() //實現CString型別資料的傳送

{

UpdateData(TRUE);

if (m_szData.IsEmpty()) {

m_szData = _T("Hello");

UpdateData(FALSE);

}

// m_szData += "\0";

HWND hWndRcv = ::FindWindow(NULL,"Receiver");

if (hWndRcv == NULL) {

AfxMessageBox(_T("找不到接收視窗，傳送不成功"));

return ;

}

COPYDATASTRUCT cpd;

cpd.dwData = STRING; //標誌為CString型別

cpd.cbData = m_szData.GetLength() + 1;

//GetLength()只是取得實際字元的長度，沒有包括"\0".

cpd.lpData = (void*)m_szData.GetBuffer(cpd.cbData);

::SendMessage(hWndRcv,WM_COPYDATA,(WPARAM)this->m_hWnd,(LPARAM)&cpd);

m_szData.ReleaseBuffer();

AfxMessageBox(_T("傳送成功"));

}

void CSendDataDlg::OnBtStu() //實現Student型別資料的傳送

{

UpdateData();

m_szID += "\0";

m_szName += "\0";

m_szRoom += "\0";

m_szTel += "\0";

m_pStu = new Student();

strcpy(m_pStu->ID,m_szID.GetBuffer(m_szID.GetLength()));

_tcscpy(m_pStu->Name,m_szName.GetBuffer(m_szName.GetLength()));

strcpy(m_pStu->Room,m_szRoom.GetBuffer(m_szRoom.GetLength()));

strcpy(m_pStu->Tel,m_szTel.GetBuffer(m_szTel.GetLength()));

m_szID.ReleaseBuffer();m_szName.ReleaseBuffer();

m_szRoom.ReleaseBuffer();m_szTel.ReleaseBuffer();

m_pStu->Age = m_nAge;

m_pStu->Grade = m_nGrade;

HWND hWndRcv = ::FindWindow(NULL,"Receiver");

if (hWndRcv == NULL) {

AfxMessageBox(_T("找不到接收視窗，傳送不成功"));

return ;

}

COPYDATASTRUCT cpd;

cpd.dwData = STUDENT; // 標誌為Student型別

cpd.cbData = sizeof(Student);

cpd.lpData = (PVOID)m_pStu;

::SendMessage(hWndRcv,WM_COPYDATA,(WPARAM)this->m_hWnd,(LPARAM)&cpd);

delete m_pStu;

AfxMessageBox(_T("傳送成功"));

}

接收方:

在OnInitDialog方法中:

//***************************************************************

//初始化ListCtrl控制元件

LVCOLUMN column;

column.mask = LVCF_TEXT | LVCF_SUBITEM | LVCF_WIDTH;

column.cx = 80;

column.iSubItem = 0;

column.pszText = _T("ID");

m_ListCtl.InsertColumn(0,&column);

column.cx = 80;

column.pszText = _T("Name");

column.iSubItem = 1;

m_ListCtl.InsertColumn(1,&column);

column.cx = 55;

column.pszText = _T("Age");

column.iSubItem = 2;

m_ListCtl.InsertColumn(2,&column);

column.cx = 55;

column.pszText = _T("Grade");

column.iSubItem = 3;

m_ListCtl.InsertColumn(3,&column);

column.cx = 55;

column.pszText = _T("Room");

column.iSubItem = 4;

m_ListCtl.InsertColumn(4,&column);

column.cx = 80;

column.pszText = _T("Tel");

column.iSubItem = 5;

m_ListCtl.InsertColumn(5,&column);

BOOL CReceiverDlg::OnCopyData(CWnd* pWnd, COPYDATASTRUCT* pCopyDataStruct)

{

switch (pCopyDataStruct->dwData) { // 接收到的是CString型別

case STRING:

m_szData += (LPCSTR)(pCopyDataStruct->lpData);

UpdateData(FALSE);

break;

case STUDENT: // 接收到的是Student型別

CString id,name,room,tel;

UINT age,grade;

CString str;

Student* pStu = (Student*)(pCopyDataStruct->lpData);

id = pStu->ID;

name = pStu->Name;

room = pStu->Room;

tel = pStu->Tel;

age = pStu->Age;

grade = pStu->Grade;

LVITEM item;

// 把接收到的資料顯示到ListCtrl控制元件上

item.mask = LVIF_TEXT;

int n = m_ListCtl.GetItemCount();

item.iItem = n;

item.iSubItem = 0;

item.pszText = id.GetBuffer(id.GetLength());

id.ReleaseBuffer();

m_ListCtl.InsertItem(&item);

m_ListCtl.SetItemText(n,1,name);

str.Format("%d",age);

m_ListCtl.SetItemText(n,2,str);

str.Format("%d",grade);

m_ListCtl.SetItemText(n,3,str);

m_ListCtl.SetItemText(n,4,room);

m_ListCtl.SetItemText(n,5,tel);

UpdateData(FALSE);

//delete pStu;

break;

}

// return CDialog::OnCopyData(pWnd, pCopyDataStruct);

return TRUE;