Artifact 109289fec72a32d49dbb1bb9d8f50bf36b99177a
private import win32.windows;
private import std.string;
class WinDLLException : Exception
{
private this( string msg ) { super(msg); }
}
class WinDLL
{
// constructor:
// Load a DLL with specified name
this( string dllname )
{
char original_cur[MAX_PATH];
char sys[MAX_PATH];
GetCurrentDirectoryA(MAX_PATH, original_cur.ptr);
GetSystemDirectoryA(sys.ptr, MAX_PATH);
SetCurrentDirectoryA(sys.ptr);
handle = LoadLibraryA( dllname.ptr );
SetCurrentDirectoryA(original_cur.ptr);
if( handle is null )
throw new WinDLLException( dllname ~ " not found" );
}
static WinDLL load( string name )
{
try {
return new WinDLL(name);
} catch(WinDLLException e) { return null; }
}
// close:
// free the DLL
void close()
{
if( handle )
{
FreeLibrary( handle );
handle = null;
}
}
// get_api:
// extract a function with specified name from the DLL.
// may return null.
template get_api(FnT)
{
FnT get_api( string apiname )
in { assert(handle); }
body
{
return cast(FnT) GetProcAddress( handle, apiname.toStringz() );
}
}
// load_resource:
// extract a resource
void* load_resource( string resname, char* type )
in { assert(handle); }
body
{
HRSRC hi = FindResource( handle, resname.toStringz(), type );
if( hi is null )
return null;
HGLOBAL hr = LoadResource( handle, hi );
if( hr is null )
return null;
return LockResource( hr );
}
// load_diaglog:
// specialized version of load_resource
void* load_dialog( string resname )
{
return load_resource( resname, RT_DIALOG );
}
private HINSTANCE handle;
}