Re: What color is gray? - C / C++ / MFC Discussion Boards

ns1-Oct-02 7:43

1-Oct-02 7:43

Terrific. Now I know who to bother when I (eventually) get started on the process. Thanks a million for the link to the book. I
'lll just buy it and not wait for official channels to order it.....I feel more confident now knowing that soon the mists of the concept will be lifted (I hope!)
Smile | :)

Re: writing help docs

ns1-Oct-02 7:53

1-Oct-02 7:53

My books on its way - had to buy it used - its out of print. Have fun!

Re: writing help docs

Ravi Bhavnani1-Oct-02 7:54

Ravi Bhavnani

1-Oct-02 7:54

Keeeeeeeeeewl!

I have to show you my GPS hack one of these days. I'm using it to track trucks whizzing past in scenic Illinois! (Man with too much time on his hands Smile | :)

)

/ravi

Let's put "civil" back in "civilization"
http://www.ravib.com
ravib@ravib.com

Re: writing help docs

Ravi Bhavnani1-Oct-02 8:08

Ravi Bhavnani

1-Oct-02 8:08

Btw, the help compiler included in the book is circa 1912. Be sure to download the latest version and docs from here[^]. You can still use the same book.

/ravi

Let's put "civil" back in "civilization"
http://www.ravib.com
ravib@ravib.com

What color is gray?

Aaron Schaefer1-Oct-02 7:06

Aaron Schaefer

1-Oct-02 7:06

Hi,

I need to know how to specify the system color used in a GRAY_BRUSH as an RGB macro. In other words, if I have something like

RGB(r, g, b)

Then what values should r, g, and b equal to match LTGRAY_BRUSH, GRAY_BRUSH, etc. Are there some defined constants for gray, light gray, etc?

Thanks,

Aaron

Re: What color is gray?

Ravi Bhavnani1-Oct-02 7:11

Ravi Bhavnani

1-Oct-02 7:11

In terms of RGB, lt gray is (192, 192, 192), medium gray is (128, 128, 128) and dark grey is (64, 64, 64). Not sure if this information actually helps you.

/ravi

Let's put "civil" back in "civilization"
http://www.ravib.com
ravib@ravib.com

Re: What color is gray?

Dimitri Rochette1-Oct-02 7:29

Dimitri Rochette

1-Oct-02 7:29

Hope this could help you.

GetSysColorBrush
http://msdn.microsoft.com/library/en-us/wceui40/htm/cerefGetSysColorBrush.asp

GetSysColor
http://msdn.microsoft.com/library/en-us/sysinfo/base/getsyscolor.asp

Re: What color is gray?

Chad Koehler1-Oct-02 7:26

Chad Koehler

1-Oct-02 7:26

You can user the GetSystemColor() function to get any of the Windows system colors. You can use GetRValue() GetGValue() and GetBValue() to get the actual values (that you may or may not still need).

Re: What color is gray?

Aaron Schaefer1-Oct-02 8:26

Aaron Schaefer

1-Oct-02 8:26

Thanks for the tips! I think the GetSysColor is the one I need.

How can I manage to execute an application in a administrator mode

Alex Gomara1-Oct-02 6:40

Alex Gomara

1-Oct-02 6:40

I've seen it but I don't know how to programm it in my application. I mean, if the application has to be executed by a inexperienced user then he has to execute, for instance, "application.exe", but if I have to do some kind of administration (for example change an IP address) executed like "application.exe -admin" that shows me up a different dialog.

How can I programm this two different rutines??

Thaks

Re: How can I manage to execute an application in a administrator mode

Tomasz Sowinski1-Oct-02 6:49

Tomasz Sowinski

1-Oct-02 6:49

What actually is your problem? You want your program to perform different actions depending on presence of some command-line argument? Or rather you're asking about the function which tells if current user has administrative rights?

Tomasz Sowinski -- http://www.shooltz.com

*** Si fractum non sit, noli id reficere. ***

Re: How can I manage to execute an application in a administrator mode

Alex Gomara1-Oct-02 7:13

Alex Gomara

1-Oct-02 7:13

The first one, to perform different actions depending on command-line arguments.

Thanks. Smile | :)

Re: How can I manage to execute an application in a administrator mode

Rick Crone2-Oct-02 9:26

Rick Crone

2-Oct-02 9:26

The command line parameters can be used in the InitInstance() of your application. The command line is stored in m_lpCmdLine which is a char array. If you pass your parameter with a slash (ie. /MYPARM) they will be considered flags. If you don't include the slash the first
parameter will be considered to be the file you want to open. You can turn off that behavior my setting:

cmdIndo.mShellCommand = CCommandLineInfo::FileNew;

but why not just include the slash?

*NOTE you can test your command line parameter in the developer studio!
see the PROJECT - SETTINGS - DEBUG(tab)

Storing 2 longs in a single variable

Gilfrog1-Oct-02 6:40

Gilfrog

1-Oct-02 6:40

How can i store 2 longs in a single variable. Similare to storing 2 shorts in a long with the MAKELONG macro. Can i do this with Long64?

Thanks

Re: Storing 2 longs in a single variable

Tomasz Sowinski1-Oct-02 6:47

Tomasz Sowinski

1-Oct-02 6:47

use std::pair.

Tomasz Sowinski -- http://www.shooltz.com

*** Si fractum non sit, noli id reficere. ***

Re: Storing 2 longs in a single variable

Gilfrog1-Oct-02 6:53

Gilfrog

1-Oct-02 6:53

I don't think that will work because that stores it in a structure. I need it to be in one variable.

Re: Storing 2 longs in a single variable

C^hris L^osinger1-Oct-02 6:52

C^hris L^osinger

1-Oct-02 6:52

use an unsigned __int64, something like:

unsigned __int64 i64 = (unsigned long)longOne * ((unsigned long)-1) + longTwo;

ie.. the high 4 bytes are your first long and the low four are your 2nd long.

-c

All you have to do is tell the people they are being attacked, and denounce the opposition for lack of patriotism and exposing the country to danger.
-- Herman Goering, on how to control the public

War Pigs

Re: Storing 2 longs in a single variable

Gilfrog1-Oct-02 7:02

Gilfrog

1-Oct-02 7:02

How do i get the two longs back out of the unsigned__int64?

Re: Storing 2 longs in a single variable

C^hris L^osinger1-Oct-02 10:56

C^hris L^osinger

1-Oct-02 10:56

longOne = i64 / (unsigned long)-1;
longTwo = i64 - (longOne * (unsigned long)-1);

or something similar

-c

All you have to do is tell the people they are being attacked, and denounce the opposition for lack of patriotism and exposing the country to danger.
-- Herman Goering, on how to control the public

War Pigs

Re: Storing 2 longs in a single variable

Tomasz Sowinski1-Oct-02 6:57

Tomasz Sowinski

1-Oct-02 6:57

Gilfrog wrote:
I need it to be in one variable.

You may use __int64 if you want to play with shifting bits. But why can't you use a structure?

Tomasz Sowinski -- http://www.shooltz.com

*** Si fractum non sit, noli id reficere. ***

Re: Storing 2 longs in a single variable

Ryan B.1-Oct-02 7:52

Ryan B.

1-Oct-02 7:52

A structure would solve the issue would it not?

#pragma pack(1)
typedef struct two_longs_dont_make_a_right
{
long one;
long erone;
} two_longs;

? Why in 'one' variable?

Ryan Baillargeon
Software Specialist
Fuel Cell Technologies Inc.

Re: Storing 2 longs in a single variable

Anonymous1-Oct-02 8:26

Anonymous

1-Oct-02 8:26

I need to save an Array of 2 shorts and long to a text file. I just figured it would be easier to save them in one variable that to seperate them with commas or something like that.

Re: Storing 2 longs in a single variable

Chris Richardson1-Oct-02 8:33

Chris Richardson

1-Oct-02 8:33

Why not use a structure in combination with a union, like so:

typedef struct tagTwoLongs
{
   union
   {
      struct
      {
         long Long1;
         long Long2;
      };
      __int64 OneVariable;
   };
}TwoLongs;

Now you can refer to the two longs separately, via Long1 and Long2, or together, via OneVariable.

Chris Richardson

Re: Storing 2 longs in a single variable

Scott H. Settlemier1-Oct-02 9:19

Scott H. Settlemier

1-Oct-02 9:19

Make sure that the pack pragma is 4 or less for the union
technique to work. You might want to ensure this by temporarily
specifying the packing alignment:

<br />
#pragma pack(push,4)<br />
typedef struct tagTwoLongs<br />
{<br />
   union<br />
   {<br />
      struct<br />
      {<br />
         long Long1;<br />
         long Long2;<br />
      };<br />
      __int64 OneVariable;<br />
   };<br />
}TwoLongs;<br />
#pragma pack(pop)

P.S. Is there a way to get a compile time
assertion that sizeof(long)==4?

Re: Storing 2 longs in a single variable

Chris Richardson1-Oct-02 9:22

Chris Richardson

1-Oct-02 9:22

Good call on the packing. I forgot about that.

Scott H. Settlemier wrote:
P.S. Is there a way to get a compile time
assertion that sizeof(long)==4?

Yeah, in winnt.h, there's a macro called C_ASSERT. Here's it's definition, and the comment that describes it:

//
// C_ASSERT() can be used to perform many compile-time assertions:
//            type sizes, field offsets, etc.
//
// An assertion failure results in error C2118: negative subscript.
//

#define C_ASSERT(e) typedef char __C_ASSERT__[(e)?1:-1]

Chris Richardson

Last Visit: 31-Dec-99 18:00 Last Update: 3-May-24 6:47

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