On Apr 4, 2005 1:04 PM, Tawade, Prashant <prashant.tawade@xxxxxxxxx> wrote: > > Hi > > Does anyone know how to build a 64 bit driver with "32 bit unsigned long", > as is in the case of windows 64 bit drivers ? > > Prashant Hi Prashant, What exactly do you mean? With a 64-bit compile, an unsigned long variable is going to be 64-bits wide. As far as I know, there is no way to change that. sizeof(long) == sizeof(void *) has to be true. To use a 32-bit wide (unsigned) variable, use the unsigned int type. For example: typedef unsigned int u32type; "u32type" can be whatever you want to call your unsigned 32-bit data type. If this code has to work for both 32- and 64-bit environments, then you should use some #if statements to determine which typedef to use. Is this what you wanted to know, or are you asking something different? Jonathan
