LPCSTR ReadFromFile()
{
    HANDLE FileHandle;
    DWORD R;
    DWORD Size;
    char Line[256];
    FileHandle = CreateFileA("C:\\file.txt",GENERIC_READ,FILE_SHARE_READ,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);
    Size = GetFileSize(FileHandle, &Size);
    ReadFile(FileHandle, Line, Size, &R, NULL);
    return Line;
}



int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{

	MessageBox(0,ReadFromFile(),"",0);

}