。其实最典型的用法是写反安装程序. 闲来无事，Bear掰到一种还算巧妙的“删除自己”的方法。

　　大家都知道，一般的程序运行的时候，可执行文件本身是被操作系统保护的，不能用改写的方式访问，更别提在本身还在运行的时侯删除自己了。在Lu0的主页上看到一种UNDOCUMENT的方法，通过改变系统底层的文件访问模式实现删除自己，那是实在功夫。我看了很是佩服。但是有没有一种用在MSDN上就能查到的函数实现呢？有!Jeffrey Richter给我们做了一个范例：

　　DeleteMe.CPP
Module name: DeleteMe.cpp
Written by: Jeffrey Richter
Description: Allows an EXEcutable file to delete itself
**************************************************/
#include <Windows.h>
#include <stdlib.h>
#include <tchar.h>
/////////////////////////////////////////////////
int WINAPI WinMain(HINSTANCE h, HINSTANCE b, LPSTR psz, int n) {
// Is this the Original EXE or the clone EXE?
// If the command-line 1 argument, this is the Original EXE
// If the command-line >1 argument, this is the clone EXE
if (__argc == 1) {
// Original EXE: Spawn clone EXE to delete this EXE
// Copy this EXEcutable image into the user's temp directory
TCHAR szPathOrig[_MAX_PATH], szPathClone[_MAX_PATH];
GetModuleFileName(NULL, szPathOrig, _MAX_PATH);
GetTempPath(_MAX_PATH, szPathClone);
GetTempFileName(szPathClone, __TEXT("Del"), 0, szPathClone);
CopyFile(szPathOrig, szPathClone, FALSE);
//***注意了***:
// Open the clone EXE using FILE_FLAG_DELETE_ON_CLOSE
HANDLE hfile = CreateFile(szPathClone, 0, FILE_SHARE_READ, NULL, OPEN_EXISTI
NG, FILE_FLAG_DELETE_ON_CLOSE, NULL);
// Spawn the clone EXE passing it our EXE's process handle
// and the full path name to the Original EXE file.
TCHAR szCmdLine[512];
HANDLE hProcessOrig = OpenProcess(SYNCHRONIZE, TRUE, GetCurrentProcessId());
wsprintf(szCmdLine, __TEXT("%s %d \"%s\""), szPathClone, hProcessOrig, szPat
hOrig);
STARTUPINFO si;
ZeroMemory(&si, sizeof(si));
si.cb = sizeof(si);
PROCESS_INFORMATION pi;
CreateProcess(NULL, szCmdLine, NULL, NULL, TRUE, 0, NULL, NULL, &si, &pi);
CloseHandle(hProcessOrig);
CloseHandle(hfile);
// This original process can now terminate.
} else {
// Clone EXE: When original EXE terminates, delete it
HANDLE hProcessOrig = (HANDLE) _ttoi(__targv[1]);
WaitForSingleObject(hProcessOrig, INFINITE);
CloseHandle(hProcessOrig);
DeleteFile(__targv[2]);
// Insert code here to remove the subdirectory too (if desired).
// The system will delete the clone EXE automatically
// because it was opened with FILE_FLAG_DELETE_ON_CLOSE
}
return(0);
}