DLL和EXE加载包在自身内部的资源文件

1、插入资源的方法
insert-->resource-->import,在出现的对话框中选择一个要作为资源的文件，接着在出现的对话框中Resource type：下面的框中随便自己输入一个串（如123），查找资源的时候会用到，点击OK，编译一下工程，资源插入完毕（在resource.h文件中会增加一条#define IDR_1231 130，在rc文件中会增加一条IDR_1231 123 DISCARDABLE
"所选的文件名字"）。

2、EXE中查找资源并释放

char rcFileName [ 256 ];

char rcFilePath [ 1024 ];

ZeroMemory ( rcFileName , 256 );

ZeroMemory ( rcFilePath , 1024 );

strncpy ( rcType , "123" , strlen ( "123" ) );

strncpy ( rcFileName , "所选的文件名" , strlen ( "所选的文件名" ) );

HMODULE hInstance = GetModuleHandle ( NULL );

HRSRC hRes = NULL; //resource handle

HGLOBAL hgpt = NULL; //resource pointer

LPVOID lpBuff = NULL; //resource buffer pointer

DWORD rcSize = 0; //resource size

DWORD dwByte; //byte size had been write

HANDLE hFile = INVALID_HANDLE_VALUE; //file to write

hRes = ::FindResource ( hInstance , MAKEINTRESOURCE ( rcID ) , rcType );

if ( NULL == hRes )

{

return FALSE;

}

hgpt = ::LoadResource ( hInstance , hRes );

if ( NULL == hgpt )

{

return FALSE;

}

rcSize = ::SizeofResource ( hInstance , hRes );

lpBuff = ::LockResource ( hgpt );

//now i will read the resource and write it to an file

strcat ( rcFilePath , "c://windows//system32//" ); // 不同情况自己指定

strcat ( rcFilePath , rcFileName );

hFile = CreateFile ( rcFilePath , GENERIC_WRITE , 0 , NULL ,

CREATE_ALWAYS , FILE_ATTRIBUTE_NORMAL , NULL );

if ( INVALID_HANDLE_VALUE == hFile )

{

CloseHandle ( hFile );

return FALSE;

}

WriteFile ( hFile , lpBuff , rcSize , &dwByte , NULL );

CloseHandle ( hFile );

if ( dwByte != rcSize )

return FALSE;

释放资源完毕

3、DLL中查找资源并释放

char rcFileName [ 256 ];

char rcFilePath [ 1024 ];

ZeroMemory ( rcFileName , 256 );

ZeroMemory ( rcFilePath , 1024 );

strncpy ( rcType , "123" , strlen ( "123" ) );

strncpy ( rcFileName , "所选的文件名" , strlen ( "所选的文件名" ) );

HMODULE hInstance = GetModuleHandle ( "abc.dll" );// abc.dll就是带有资源的dll，

一定不能填NULL，那样会找不到资源的

HRSRC hRes = NULL; //resource handle

HGLOBAL hgpt = NULL; //resource pointer

LPVOID lpBuff = NULL; //resource buffer pointer

DWORD rcSize = 0; //resource size

DWORD dwByte; //byte size had been write

HANDLE hFile = INVALID_HANDLE_VALUE; //file to write

hRes = ::FindResource ( hInstance/*不能填NULL*/ , MAKEINTRESOURCE ( rcID ) , rcType );

if ( NULL == hRes )

{

return FALSE;

}

hgpt = ::LoadResource ( hInstance/*不能填NULL*/ , hRes );

if ( NULL == hgpt )

{

return FALSE;

}

rcSize = ::SizeofResource ( hInstance/*不能填NULL*/ , hRes );

lpBuff = ::LockResource ( hgpt );

//now i will read the resource and write it to an file

strcat ( rcFilePath , "c://windows//system32//" ); // 不同情况自己指定

strcat ( rcFilePath , rcFileName );

hFile = CreateFile ( rcFilePath , GENERIC_WRITE , 0 , NULL ,

CREATE_ALWAYS , FILE_ATTRIBUTE_NORMAL , NULL );

if ( INVALID_HANDLE_VALUE == hFile )

{

CloseHandle ( hFile );

return FALSE;

}

WriteFile ( hFile , lpBuff , rcSize , &dwByte , NULL );

CloseHandle ( hFile );

if ( dwByte != rcSize )

return FALSE;

释放资源完毕

这种封装常见于dll中，一个大型的软件，可以将一些配置文件，其他不希望用户看到的文件封装起来，比如某个Exe。用户通过查找资源，获取资源的指针和大小就可以去读到exe资源，并把这exe保存到硬盘临时文件，然后使用ShellExecute或者CreateProcess调用。便达到了封装的目的。