这里列举对于函数的处理---读取文件个数，并逐个计算每个文件的crc值。
代码如下：
1 void CFile_DemoDlg::OnDropFiles(HDROP hDropInfo) 2 { 3 // TODO: 在此添加消息处理程序代码和/或调用默认值 4 UINT fileCount; 5 WORD crc,n; 6 BYTE szchar[201], crc_hex[4], bt; 7 CString strtmp; 8 TCHAR file_name[MAX_PATH] = { 0 }; 9 //get number of drop files. 10 fileCount = DragQueryFile(hDropInfo,0xffffffff,NULL,0); 11 for (UINT i = 0; i < fileCount; i++) 12 { 13 DragQueryFile(hDropInfo,i,file_name,MAX_PATH-1);//get the file name of the i-th file 14 CFile file(file_name,CFile::modeRead);//open the file 15 UpdateData(true); 16 m_path += file.GetFilePath(); 17 m_path += " "; 18 crc = 0xffff; 19 memset(szchar, 0, 201); 20 while (file.Read(szchar, 200)) 21 { 22 n = 0; 23 while (szchar[n]) 24 { 25 crc = crc_16(crc, szchar[n]); 26 n++; 27 } 28 memset(szchar, 0, 201); 29 } 30 strtmp.Format(_T("%d"), crc); 31 m_dec += strtmp; 32 m_dec += " "; 33 swap_word_byte(crc, crc_hex); 34 for (UINT i = 0; i < 4; i++) 35 { 36 bt = *(char*)(crc_hex + i); 37 strtmp.Format(_T("%c"), bt); 38 m_hex += strtmp; 39 } 40 m_hex += " "; 41 UpdateData(false); 42 CEdit *pEdit = (CEdit*)this->GetDlgItem(IDC_EDIT1); 43 pEdit->LineScroll(pEdit->GetLineCount()); 44 pEdit = (CEdit*)this->GetDlgItem(IDC_EDIT2); 45 pEdit->LineScroll(pEdit->GetLineCount()); 46 pEdit = (CEdit*)this->GetDlgItem(IDC_EDIT3); 47 pEdit->LineScroll(pEdit->GetLineCount()); 48 file.Close(); 49 } 50 DragFinish(hDropInfo); 51 52 53 CDialogEx::OnDropFiles(hDropInfo); 54 }
注： fileCount = DragQueryFile(hDropInfo,0xffffffff,NULL,0); 返回拖拽文件个数。
谢谢.