WIN32 general query
 

HINSTANCE hinst
HWND hWnd,
UINT wMsgFilterMin
UINT wMsgFilterMax
UINT wRemoveMsg
DWORD dw
Can these be regarded as variables as we regard (int x) x as a variable???





Any help will be appreciated.

Re: WIN32 general query
 

HINSTANCE hinst
HWND hWnd,
UINT wMsgFilterMin
UINT wMsgFilterMax
UINT wRemoveMsg
DWORD dw
Yes all are variables,
only thing is HWND and HINSTACE is defined as unsigned 32-bit quantities in windows.h but should not be modified by the programmer.
UINT is unsigned integer and DWORD is 32 bit usigned integer. These can be used a normal variable
see link for more clarity and details
http://en.wikibooks.org/wiki/Windows...a_Types#HANDLE

Re: WIN32 general query
 

Why doesnt Windows use int, char, unsigned int datatypes??????

Re: WIN32 general query
 

"so that when you are reading the code, you know exactly what type of variable it is. "
see Hungarian Notation in the link that I sent in the first reply.

This is mainly for good readabilty of code and easier programming for complex codes.
eg 1) DWORD is always 32 bytes int can be 16 , 32, 64 depending on machine.
2) when I say HWND variable name, I know that the variable represent an handle to window which would not be known if i use int, also HWND is encapsulated and user need not worry about underlying datatype.
3) when using int , int is taken as unsigned int in some machine and signed in some machine,
which causing bugs in the code. for different os.
i think the list goes on, just have to think about it.

Re: WIN32 general query
 

You're thinking of "char" which is signed on some machines and unsigned on others.
In C/C++, "int" is always signed.