large_integerVB获取可移动磁盘的序列号和容量

用字母代替数字，sleep被什么代替

方法一：就是你说的Sleep 使用sleep函数的不利处在于期间不能处理其他的消息，如果时间太长，就好象死机一样，所以我们利用 COleDateTime类和COleDateTimeSpan类结合WINDOWS的消息处理过程来实现延时： COleDateTime start_time = COleDateTime::GetCurrentTime(); COleDateTimeSpan end_time = COleDateTime::GetCurrentTime()-start_time; While(end_time.GetTotalSeconds() <= 2) //实现延时2秒 { MSG msg; GetMessage(&msg,NULL,0,0); TranslateMessage(&msg); DispatchMessage(&msg); End_time = ColeDateTime::GetCurrentTime-start_time; }//这样在延时的时候我们也能够处理其他的消息。

方法三： 可以采用GetTickCount()函数，该函数的返回值是DWORD型，表示以毫秒为单位的计算机启动后经历的时间间隔。

DWORD dwStart = GetTickCount(); DWORD dwEnd = dwStart; do { MSG msg; GetMessage(&msg,NULL,0,0); TranslateMessage(&msg); DispatchMessage(&msg); dwEnd = GetTickCount(); } while((dwEnd - dwStart) <= 2000); 上面的方法在延时的精确度上，很多时候不能满足我们的要求，下面是一种更精确的微秒级延时： LARGE_INTEGER litmp ; LONGLONG QPart1,QPart2 ; double d=0; QueryPerformanceCounter(&litmp) ; // 获得初始值 QPart1 = litmp.QuadPart ; while (d<40)//你想要的时间 { QueryPerformanceCounter(&litmp) ; QPart2 = litmp.QuadPart ; d=(double)(QPart2 - QPart1); }

MoveFileWithProgress函数怎么用？

MoveFileWithProgress 功能与 MoveFileEx 是相同的，只不过 MoveFileWithProgress 允许你提供一个接收移动进度消息的回调函数。

MoveFile 函数移动已存在的文件或文件夹，包括它的子文件和文件夹。

只能在同一目录或volume(卷)下移动

MoveFileEx or MoveFileWithProgress 指定如何去移动文件。

可以在不同volume下移动，但必须指定MOVEFILE_COPY_ALLOWED，但有时移动不成功，会出现error(5)的错误，这跟系统的读取权限有关。

MoveFileTransacted 允许执行事务处理的操作。

#define _WIN32_WINNT 0x0500 // 不加这个不同通过编译 #include <windows.h> #include <stdio.h>

DWORD CALLBACK CopyProgress( LARGE_INTEGER TotalFileSize, // total file size, in bytes LARGE_INTEGER TotalBytesTransferred, // total number of bytes transferred LARGE_INTEGER StreamSize, // total number of bytes for this stream LARGE_INTEGER StreamBytesTransferred, // total number of bytes transferred for this stream DWORD dwStreamNumber, // the current stream DWORD dwCallbackReason, // reason for callback HANDLE hSourceFile, // handle to the source file HANDLE hDestinationFile, // handle to the destination file LPVOID lpData // passed by CopyFileEx ) { static int nRecord = 0; nRecord++; printf("回调次数：%d 已传输：%08X:%08X 文件大小：%08X:%08X ", nRecord, TotalBytesTransferred.HighPart, TotalBytesTransferred.LowPart, TotalFileSize.HighPart, TotalFileSize.LowPart); return PROGRESS_CONTINUE; }

int main(int argc, char* argv[]) { if(argc!=3) { printf("用法：命令 源文件 目标文件"); return 0; }

if(!CopyFileEx(argv[1],argv[2],(LPPROGRESS_ROUTINE)CopyProgress,NULL,FALSE,COPY_FILE_FAIL_IF_EXISTS)) { printf("CopyFileEx() failed."); return 0; } return 0; }

VB获取可移动磁盘的序列号和容量

Private Declare Function GetLogicalDriveStrings Lib "kernel32" Alias _ "GetLogicalDriveStringsA" (ByVal nBufferLength As Long, _ ByVal lpBuffer As String) As Long 取得当前所有盘符 Private Declare Function GetDriveType Lib "kernel32" Alias "GetDriveTypeA" _ (ByVal nDrive As String) As Long 判断盘符类型 Private Declare Function GetDiskFreeSpace Lib "kernel32" Alias "GetDiskFreeSpaceA" (ByVal lpRootPathName As String, lpSectorsPerCluster As Long, lpBytesPerSector As Long, lpNumberOfFreeClusters As Long, lpTtoalNumberOfClusters As Long) As Long 这个或者下面函数取得磁盘信息 Private Declare Function GetDiskFreeSpaceEx Lib "kernel32.dll" Alias "GetDiskFreeSpaceExA" (ByVal lpDirectoryName As String, ByRef lpFreeBytesAvailableToCaller As ULARGE_INTEGER, ByRef lpTotalNumberOfBytes As ULARGE_INTEGER, ByRef lpTotalNumberOfFreeBytes As ULARGE_INTEGER) As Long