创建共享内存，为什么读出来的数据总是空的呢,该如何处理

创建共享内存，为什么读出来的数据总是空的呢
我的代码如下：
m_hShareFile = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, 0, SHARE_DATA_LENGTH, SHARE_DATA_FILENAME);
if(NULL == m_hShareFile) 
{
AfxMessageBox("创建共享内存失败");
return FALSE;
}
m_pbyteShareDataBuffer=(BYTE *) ::MapViewOfFile(m_hShareFile, FILE_MAP_READ | FILE_MAP_WRITE, 0, 0, 0);
*(m_pbyteShareDataBuffer++)=0x1;
*(m_pbyteShareDataBuffer++)=0x11;
*(m_pbyteShareDataBuffer++)=0x12;
*(m_pbyteShareDataBuffer++)=0x13;
*(m_pbyteShareDataBuffer++)=0x14;

char temp[9];

int i=0;
FILE *pf=NULL;
pf=fopen("E:\\a.txt","w");
while(i<5)
{
fseek(pf, 0L, SEEK_END);
sprintf(temp,"%02x ",m_pbyteShareDataBuffer[i]);
fwrite(temp,1,3,pf);
i++;

}

fclose(pf);

写入文件后，里面的00 00 00 00 00，我想问是怎么回事？？

------解决方案--------------------
*(m_pbyteShareDataBuffer++)=0x1;
你这个头指针在不断移动啊！！！

定义个临时指针，pTemp = pbyteShareDataBuffer，然后再
 *(pTemp++)=0x1;
。。。
------解决方案--------------------
m_pbyteShareDataBuffer做自加运算了，不是指向开头地址了

应该是
*(m_pbyteShareDataBuffer+0)=0x1;
*(m_pbyteShareDataBuffer+1)=0x11;
*(m_pbyteShareDataBuffer+2)=0x12;
*(m_pbyteShareDataBuffer+3)=0x13;
*(m_pbyteShareDataBuffer+4)=0x14;