利用windows自带的gzip.dll进行压缩（VB版本）可以修改为VC

 

Option Explicit


Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (hpvDest As Any, hpvSource As Any, ByVal cbCopy As Long)
Private Declare Function InitDecompression Lib "gzip.dll" () As Long
Private Declare Function CreateDecompression Lib "gzip.dll" (ByRef context As Long, ByVal Flags As Long) As Long
Private Declare Function DestroyDecompression Lib "gzip.dll" (ByRef context As Long) As Long
Private Declare Function Decompress Lib "gzip.dll" (ByVal context As Long, inBytes As Any, ByVal input_size As Long, outBytes As Any, ByVal output_size As Long, ByRef input_used As Long, ByRef output_used As Long) As Long

Private Const OFFSET As Long = &H8


'解压缩数组
Public Function UnCompressByte(ByteArray() As Byte) As Boolean
 
  Dim BufferSize  As Long
  Dim buffer()    As Byte
  Dim lReturn    As Long
 
  Dim outUsed    As Long
  Dim inUsed      As Long
 
  '创建解压缩后的缓存
  CopyMemory BufferSize, ByteArray(0), OFFSET
  BufferSize = BufferSize + (BufferSize * 0.01) + 12
  ReDim buffer(BufferSize) As Byte
 
  '创建解压缩进程
  Dim contextHandle As Long: InitDecompression
  CreateDecompression contextHandle, 1  '创建
 
  '解压缩数据
  lReturn = Decompress(ByVal contextHandle, ByteArray(0), UBound(ByteArray) + 1, buffer(0), BufferSize, inUsed, outUsed)
 
  DestroyDecompression contextHandle
 
  '删除重复的数据
  ReDim Preserve ByteArray(0 To outUsed - 1)
  CopyMemory ByteArray(0), buffer(0), outUsed
 
End Function

 

#include <windows.h>
#include <stdio.h>
int main()
{

 HINSTANCE hGetProcIDDLL = LoadLibrary("C://WINNT//system32//gzip.dll");
 printf("dll loaded");
   /* get pointer to the function in the dll*/
   FARPROC lpfnGetProcessID = GetProcAddress(HMODULE (hGetProcIDDLL),"Decompress");
   FARPROC lpfnGetProcessID1 = GetProcAddress(HMODULE (hGetProcIDDLL),"<strong class="highlight">InitDecompression</strong>");
   FARPROC lpfnGetProcessID2 = GetProcAddress(HMODULE (hGetProcIDDLL),"CreateDecompression");
   FARPROC lpfnGetProcessID3 = GetProcAddress(HMODULE (hGetProcIDDLL),"InitCompression");
   FARPROC lpfnGetProcessID4 = GetProcAddress(HMODULE (hGetProcIDDLL),"CopyMemory");
   
  
   // Call CopyMemory(arrDestination(destbeginPos), arrSource(srcbeginPos), length)

// printf("Hello World long decompress!/n");
 //printf(1);

  typedef long (__stdcall * pICFUNC)(long, BYTE[],long,BYTE[],long,long,long);
  typedef long (__stdcall * pICFUNC1)();
  typedef long (__stdcall * pICFUNC2)(long,int);
  typedef long (__stdcall * pICFUNC3)();
  typedef long (__stdcall * pICFUNC4)(BYTE[],BYTE[],long);

   typedef UINT (CALLBACK* CopyMemory)(BYTE[],BYTE[],long);
   CopyMemory ptrCopyMemory;
   ptrCopyMemory = (CopyMemory)GetProcAddress(hGetProcIDDLL,"CopyMemory");
    typedef UINT (CALLBACK* <strong class="highlight">InitDecompression</strong>)();
   <strong class="highlight">InitDecompression</strong> ptrInitDecompression;
   ptrInitDecompression = (<strong class="highlight">InitDecompression</strong>)GetProcAddress(hGetProcIDDLL,"<strong class="highlight">InitDecompression</strong>");
    //ReturnVal = ptrLockWorkStation();
   ptrInitDecompression();
   printf("Hello World long decompress!/n");
 

   pICFUNC MyFunction;
   MyFunction = pICFUNC(lpfnGetProcessID);
   pICFUNC1 MyFunction1;
   MyFunction1 = pICFUNC1(lpfnGetProcessID1);
   pICFUNC2 MyFunction2;
   MyFunction2 = pICFUNC2(lpfnGetProcessID2);
   pICFUNC3 MyFunction3;
   MyFunction3 = pICFUNC3(lpfnGetProcessID3);
   pICFUNC4 MyFunction4;
   MyFunction4 = pICFUNC4(lpfnGetProcessID4);
  
  
   //BYTE[] a=NewByteArray(jb);

 unsigned long handle=0;long max=1024;long inu=0;long outu=0;int GZIP_LVL=1;
 
  
 BYTE *AB={(unsigned char *)"1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890"};
// int li= strlen( (char*)AB);
 int orglen=100;

//printf("%l", li);

 BYTE *oB=new BYTE[43822];
  CopyMemory(AB,oB,234);   
 printf("function defined and parameters ready"+orglen,"%l",orglen);
 printf("function defined and parameters ready");
   /* The actual call to the function contained in the dll */
 
   handle=MyFunction1(); 
   //handle=MyFunction4(AB,oB,inu);
   handle=MyFunction3(); 
   printf("<strong class="highlight">InitDecompression</strong> & InitCompression");
   MyFunction2(handle,GZIP_LVL);//Call CreateDecompression(handle, GZIP_LVL);
   //handle=MyFunction2(handle,GZIP_LVL);
   printf("CreateDecompression");

  long intMyReturnVal =0;
  do
  {// int
    
    intMyReturnVal=MyFunction(handle, AB, orglen, oB, max, inu, outu);
    orglen = orglen - inu;
  }
  while(intMyReturnVal=0);

   /* Release the Dll */
   FreeLibrary(hGetProcIDDLL);
 printf("Hello World long decompress!/n");
   /* The return val from the dll */
    return intMyReturnVal;  
}