typedef rants and uses ... - C / C++ / MFC Discussion Boards

Mike Nordell14-Jul-03 9:26

14-Jul-03 9:26

nitropit wrote:
I hope administrator rights are not needed.

As documented, you need PROCESS_SET_INFORMATION access right. Thankfully no one but Administrators have this right by default - though one could consider it a flaw in the Win32 API to not let a process lower its own priority without it.

SDI Main Window

ppathan14-Jul-03 5:20

ppathan

14-Jul-03 5:20

Is there any way that the main window of SDI is always maximised?
Currently, I have to click the maximize button to make it full size.

Re: SDI Main Window

Shay Harel14-Jul-03 5:53

Shay Harel

14-Jul-03 5:53

When you create it,
Use WS_MAXIMIZE on the flags

Re: SDI Main Window

ppathan14-Jul-03 7:31

ppathan

14-Jul-03 7:31

can u provide me with exact syntax?
I tried to create it but it didn't work

Re: SDI Main Window

Shay Harel14-Jul-03 7:36

Shay Harel

14-Jul-03 7:36

Go to the OnCreate function of your main window, and at the end of the function add this line:

code>ShowWindow (SW_MAXIMIZE);<

Re: SDI Main Window

David Crow14-Jul-03 7:57

David Crow

14-Jul-03 7:57

Sans the HTML tags, of course! Blush | :O

Re: SDI Main Window

Shay Harel14-Jul-03 8:04

Shay Harel

14-Jul-03 8:04

doooooooooouuuuuuuhhhhhhhh !!!!!

But you got the main point

typedef rants and uses ...

Maximilien14-Jul-03 5:10

Maximilien

14-Jul-03 5:10

What's the use of typedefing basic types ?

I'm reviewing some old C code, and there's a lot of typedef like

typedef  float *FloatPtr;<br />
typedef  float **FloatPtr2D;<br />
typedef  float ***FloatPtr3D;<br />
typedef  float ****FloatPtr4D;<br />
<br />
typedef  unsigned int UInt;<br />
typedef  unsigned int *UIntPtr;<br />
<br />
typedef  int *IntPtr;<br />
typedef  int **IntPtr2D;<br />
typedef  int ***IntPtr3D;

and some other variants of the same things; and it's all mixed up in the code, sometimes, declaration use a typedef, but the definition use the full type.

If I need to typedef some basic types to be used all around the application to follow a code guideline, is there a standard way of doing this, in C++ preferable ?

Maximilien Lincourt
"Never underestimate the bandwidth of a station wagon filled with backup tapes." (from /.)

Re: typedef rants and uses ...

jhwurmbach14-Jul-03 5:29

jhwurmbach

14-Jul-03 5:29

Maximilien wrote:
typedef unsigned int UInt;
typedef unsigned int *UIntPtr;

Now you can write UIntPtr instead of unsigned int*.
Typedefing like this saves a few keystrokes.
Even Microsoft does it: you van write UINT for 'unsigned int' or BOOL for int.

My opinions may have changed, but not the fact that I am right.

WH_MOUSE_LL

Gleb14-Jul-03 4:30

Gleb

14-Jul-03 4:30

Hi.
I've set a low level mouse and keyboard hooks in my DLL , but for some reason
it slowers my mouse movement ( almost impossible to move ).
Does anyone knows what the problem might be?
Thanks.

Re: WH_MOUSE_LL

Duncan Edwards Jones14-Jul-03 4:35

Duncan Edwards Jones

14-Jul-03 4:35

You're not trying to do anything with the mouse (like move it or click it) in the processing of the hook event, are you? ... in fact, could you post what you are trying to do in the hook code?

'--8<------------------------
Ex Datis:
Duncan Jones
Merrion Computing Ltd

Re: WH_MOUSE_LL

Gleb14-Jul-03 20:34

Gleb

14-Jul-03 20:34

Hi.
No, I'm not trying to move it or anything else.
I just set the hook , and that's it.
Any ideas?
Thanks.

Re: WH_MOUSE_LL

Ryan Binns14-Jul-03 4:44

Ryan Binns

14-Jul-03 4:44

This is a documented side-effect of installing system-wide hooks. It's both expected and unavoidable.

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Re: WH_MOUSE_LL

Gleb14-Jul-03 20:33

Gleb

14-Jul-03 20:33

Hi.
Can you tell me where is it documented please?
Thanks.

Re: WH_MOUSE_LL

Ryan Binns14-Jul-03 22:18

Ryan Binns

14-Jul-03 22:18

MSDN: "Hook Procedures"

You should use global hooks only for debugging purposes; otherwise, you should avoid them. Global hooks hurt system performance and cause conflicts with other applications that implement the same type of global hook.

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Boot program, partition access

Kuniva14-Jul-03 4:19

Kuniva

14-Jul-03 4:19

How could i make an app start up before windows so it can access the partition tables, execute formats, repartition etc?? I mean something like Partitionmagic for example, you choose to delete a partition, like for example your C partition then it does something, u have to reboot and it does the job before windows is fully started (otherwise it cant access it because its protected?). Allthough in Windows 2000 and XP it seems sort of encapsulated, like windows starts but during startup it does the tasks, like where scandisk runs too.
Anyone know how to do this from an application?

Kuniva
--------------------------------------------

Re: Boot program, partition access

Mike Dimmick14-Jul-03 6:50

Mike Dimmick

14-Jul-03 6:50

http://www.sysinternals.com/ntw2k/info/native.shtml[^]

recordset question

jafrazee14-Jul-03 4:13

jafrazee

14-Jul-03 4:13

is there a way to pack or zap a recordset?
or do i have to create an outside program?

Re: recordset question

Alexandru Savescu14-Jul-03 4:29

Alexandru Savescu

14-Jul-03 4:29

What do you mean by recordset?
Do you mean database recordset? Confused | :confused:

Best regards,
Alexandru Savescu

P.S. Interested in art? Visit this!

Re: recordset question

jafrazee14-Jul-03 7:32

jafrazee

14-Jul-03 7:32

yes, i am sorry i am most likely using the wrong wording for vc++. pack and zap are database terms. pack will permently delete all records marked for deletion. zap removes all records from the table.
are there any mfc functions that do the same.

Re: recordset question

Nick Parker14-Jul-03 4:35

Nick Parker

14-Jul-03 4:35

You could possibly serialize the recordset object, if this is what you mean, I am not sure.

-Nick Parker

Re: recordset question

jafrazee14-Jul-03 7:34

jafrazee

14-Jul-03 7:34

you know that may be what i want to do, but i can not find any documentation on it. what does that function actually do?
and what does it required to be passed?
thanks

Re: recordset question

David Crow14-Jul-03 8:02

David Crow

14-Jul-03 8:02

Is this a SQL database? If so, it has built-in stored procedures for just this sort of thing, and more.

Re: recordset question

jafrazee14-Jul-03 8:16

jafrazee

14-Jul-03 8:16

it is a access database being accessed through odbc.

Re: recordset question

David Crow14-Jul-03 8:34

David Crow

14-Jul-03 8:34

I'm not as experienced with Access, but I do not know of it having anything internally that will pack a database. If that is indeed the case, you will need to do it manually. Something like:

open database in exclusive mode
create a temporary database
for each row that is not marked for deletion, copy it to temporary database
close the temporary database
close the main database
delete the main database
rename the temporary database

This is a very high-level overview but hopefully you get the idea. You might also want to look at the Compact utility. It works in basically the same way I described above, but no doubt more elegantly!

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