something with enum

[Rare177]

ok part of this is win32 but the main part is C so i thought i would post here.
here is my prob i have these global

enum Topic {RED , GREEN , BLUE , YELLOW , PINK , PURPLE};
enum Topic Color;

then further down in the program i have this

RED = SendMessage(hwndOptRed , BM_GETCHECK , 0 , 0);

it should either get 1 or 0 from that but i am getting an error

error C2106: '=' : left operand must be l-value

im using VC++6

thanks

[Salem]

Try

Color = SendMessage(hwndOptRed , BM_GETCHECK , 0 , 0);

[Rare177]

thanks, it worked but one thing
if i do that say each time it will go up by 1 wont it, say if i do the next line

Color = SendMessage(hwndOptGreen , BM_GETCHECK , 0 , 0);

will that store the value in GREEN?

[Salem]

I don't see what an enum is doing for you here.
You could equally say

int foo;
foo = SendMessage(hwndOptRed , BM_GETCHECK , 0 , 0);
foo = SendMessage(hwndOptGreen , BM_GETCHECK , 0 , 0);

What an enum adds is the ability to do this

Color = SendMessage(hwndOptGreen , BM_GETCHECK , 0 , 0);
if ( Color == GREEN ) {
    // do stuff
}

But whether that makes any sense or not depends on your use SendMessage().

[master5001]

I don't think you are properly understanding what an enumeration is. Its actually just a constrained data type. In other words it would be like having an int that only applies to numbers 0 - 5 in this instance. There is nothing magical as to how you process an enumeration, its just the same as any other base type. The main difference is that it is suppose to have a predictable range. Obviously when using enumerations, care must be taken so as to not get an out of range value.