Win32::API::Struct->typedef( cTbl => qw{UINT_PTR opaque;});

##</code><code>##

my $LoadTableFromFile = new Win32::API("myDll.dll","int myTableLoadFromFile(char* filename, LPHANDLE pointToMyTable)")

##</code><code>##

typedef struct myTable{ 
 void* opaque;  ///< Opaque pointer to storage
} myTable;

##</code><code>##

Win32::API::Struct->typedef( myTable=> qw{PVOID opaque;});