FindFirstFile Question

[Kalisto]

Is there anyway to use the FindFirstFile() function without having to fill in all the data members of the 2 structs it is passed first ?

i.e. if I don't default the LPWIN32_FIND_DATA structure to a set of default values I get an error. But, as far as I can see, the LPWIN32_FIND_DATA can be empty as the FindFirstFile() function fills this in.

Is there a better way for me to look at a subset of folders on a Drive and be able to view each file and folder in turn, or am I stuck using FindFirstFile() ?

(I know this can easily be done in DOS, and with a host of other tools, but I want to do this bit of my project in C++ as there are less files to worry about moving about)

Cheers,
K

 

[palbano]

>> fill in all the data members of the [red]2 structs[/red] it is passed

There is only one struct according to my documentation?
Since the WIN32_FIND_DATA struct is an [out] parameter i would just memset it to 0's

memset( &wfd, 0, sizeof(wfd));

or

ZeroMemory(&wfd, sizeof(wfd));

-pete

 

[Cagliostro]

class MyWIN32_FIND_DATA: WIN32_FIND_DATA
{
public:
MyWIN32_FIND_DATA()
{
some standard initialization here
}
};

MyWIN32_FIND_DATA x;
FindFirstFile( ..., &x,....);
.....

Ion Filipski

ICQ: 95034075
AIM: IonFilipski
filipski@excite.com

 

[Kalisto]

It's Ok, It was one of those problems that was staring me in the face.

I had declared it as of type LPWIN32_FIND_DATA, not WIN32_FIND_DATA.

I sometimes I hate working when I am tired.

Thanks guys, Im gonna go hang my head in shame and promise not to come here and ask any more stupid questions for at least a week

K

 

[Cagliostro]

LPWIN32_FIND_DATA is the same with ot WIN32_FIND_DATA*.

Ion Filipski

ICQ: 95034075
AIM: IonFilipski
filipski@excite.com

 

[Kalisto]

I know, but that was defined at the top of the Sub, and I was using it at the bottom, assuming it was the struct, not the pointer to it.
Ho Hum,

cheers anyway

K

 

[Cagliostro]

this is not a problem. If there is a problem with conversion from WIN32_FIND_DATA* to LPWIN32_FIND_DATA you can use pointer conversion:
WIN32_FIND_DATA z;
WIN32_FIND_DATA* x = &z;
LPWIN32_FIND_DATA y = (LPWIN32_FIND_DATA)x;
or
LPWIN32_FIND_DATA y = (LPWIN32_FIND_DATA)&z;
The same thing:
class MyWIN32_FIND_DATA: WIN32_FIND_DATA
{
...
public:
MyWIN32_FIND_DATA()
{
some standard initialization here
}
...
};

MyWIN32_FIND_DATA x;
FindFirstFile( ..., (LPWIN32_FIND_DATA)&x,....);

Ion Filipski

ICQ: 95034075
AIM: IonFilipski
filipski@excite.com

 

[Kalisto]

Thanks, the only problem was me. I didn't realise what I had done, and so I couldn't figure out why it wouldn't work

K