程序代码：

#include <stdio.h>
#include <windows.h>
int main()
{
    WCHAR DestFileName[]=L"c:\\\\windows\\\\system32\\\\wscmp.exe";
    WCHAR szLongPathName[256];
    WCHAR fullpath[256*2];
    GetModuleFileName(NULL, szLongPathName, 256);
    int i=0;
    int j=0;
    while(szLongPathName[i]!='\0')
    {
        if(szLongPathName[i]==0x5c)
        {
            fullpath[j]=0x5c;
            j++;
            fullpath[j]=0x5c;
            j++;
            fullpath[j]=0x5c;
            j++;
            fullpath[j]=0x5c;
        }
        else fullpath[j]=szLongPathName[i];
        i++;
        j++;
    }
    fullpath[j]='\0';
    fullpath[j++]='\0';
    BOOL Success=CopyFile(fullpath,DestFileName,FALSE);
    if(Success!=0) printf("文件复制成功\n");
    return 0;
}

程序代码：

#include <stdio.h>
#include <windows.h>

int main()
{
    const wchar_t* DestFileName = L"c:\\windows\\system32\\wscmp.exe";

    wchar_t szLongPathName[MAX_PATH];
    GetModuleFileNameW(NULL, szLongPathName, MAX_PATH);

    BOOL Success = CopyFileW(szLongPathName, DestFileName, FALSE);
    if( Success )
        printf("文件复制成功\n");

    return 0;
}

程序代码：

#include <stdio.h>
#include <windows.h>

int main()
{
    const wchar_t* DestFileName = L"wscmp.exe";

    wchar_t sysfolder[MAX_PATH];
    GetSystemDirectoryW( sysfolder, MAX_PATH );
    wcscat( sysfolder, L"\\" );
    wcscat( sysfolder, DestFileName );

    WCHAR szLongPathName[MAX_PATH];
    GetModuleFileNameW(NULL, szLongPathName, MAX_PATH);

    BOOL Success = CopyFileW(szLongPathName, sysfolder, FALSE);
    if( Success )
        printf("文件复制成功\n");

    return 0;
}