在显示进度时需要显示百分比从0%---100%,添加Edit control控件,在文件拷贝时往往需要线程来做拷贝,从线程中发现消息给控件,SendMessage(GetDlgItem(hWndDlg,IDC_EDIT_PROGRESS),WM_SETTEXT,0,(LPARAM)lpszprogress),此时需注意第四个参数,若工程属性用的是Use Multi-Byte Character Set,第四个参数直接传CString会显示乱码,正确方式如下:
float fRange = 100.0*TotalBytesTransferred.LowPart/TotalFileSize.LowPart;
CString strEdit = _T("");
strEdit.Format("%.0f%%",(float)fRange);
LPTSTR lpszProgress = new TCHAR[strEdit.GetLength()+1];
_tcscpy(lpszProgress,strEdit);
SendMessage(GetDlgItem(hWndDlg,IDC_EDIT3),WM_SETTEXT,0,(LPARAM)lpszProgress);
delete []lpszProgress;
lpszProgress = NULL;