how to implement myself LoadLibrary function

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#8407

From: Siney
Date: Fri, 29 Oct 2004 09:54

38 lines
1742 bytes

hi,all:

In my project, I want to pack DLL into a compressed file.I write code like 
below:


HANDLE dllfile=CreateFile("dllhack.dll",GENERIC_READ,0,0,OPEN_ALWAYS,
  FILE_ATTRIBUTE_NORMAL,0);

 HANDLE hmod=CreateFileMapping(dllfile,0,PAGE_READONLY,0,40960,"DLLFILE");
 void* ptr=MapViewOfFile(hmod,
   FILE_MAP_READ,
   0,
   0,
   0);

 funcptr func1=(funcptr)((char*)ptr+0x00001010); //0x00001010 is DLL 
function entry address
 int ret1=func1();

if DLL function is simple like:

int dllfunc()
{
    int a=10;
    int b=11;
    return a+b;
}

the code can work fine, but if call APIs like:

int dllfunc()
{
    return MessageBox(0,"Test","Test",0);
}

the code occured AV, WHY? how to implement myself LoadLibrary function that 
can work fine? thanks

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Subject: how to implement myself LoadLibrary function
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