C / C++ / MFC

Re: want to kill previous instance of the same MFC app

31-Jan-06 1:05

http://www.codeproject.com/cpp/avoidmultinstance.asp[^]

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Rage31-Jan-06 1:52

Rage

31-Jan-06 1:52

And my favourite as well :

http://www.codeproject.com/cpp/csingleinst.asp[^]

~RaGE();

Setting wallpaper before SwitchDesktop

Chintoo72331-Jan-06 0:08

Chintoo723

31-Jan-06 0:08

I have a multiple desktop application in which I am trying to set a different wall paper when you switch between different desktops. I am setting the wallpaper as:

<br />
SystemParametersInfo(SPI_SETDESKWALLPAPER,0,(void*)m_WallPaper,SPIF_UPDATEINIFILE|SPIF_SENDWININICHANGE)<br />

This seems to set the wall paper correctly, but after I call SwitchDesktop the wall paper vanishes a few seconds later. I create a seperate explorer.exe per desktop.

1. Does any one know if there is any other way to set the wall paper?
2. Is it possible to identify what causes the wall paper to change? I mean, who has changed it?
3. Is the wall paper set by the system or windows explorer?
4. Any ideas to debug why the wall paper vanishes?

thanks!

Re: Setting wallpaper before SwitchDesktop

Owner drawn31-Jan-06 0:19

Re: Setting wallpaper before SwitchDesktop

31-Jan-06 0:19

Brundiez wrote:
SystemParametersInfo(SPI_SETDESKWALLPAPER,0,(void*)m_WallPaper,SPIF_UPDATEINIFILE|SPIF_SENDWININICHANGE)

This won't work when ActiveDesktop is enabled. You need to use IActiveDesktop COM object to solve this.

http://www.codeproject.com/tools/wallpaperq.asp[^]

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Chintoo72331-Jan-06 0:33

Chintoo723

31-Jan-06 0:33

1. From the look of my desktop, I dont think I have ActiveDesktop enabled. How do I confirm if it is enabled?
2. Does the IActiveDesktop COM object's way of setting the wall paper help in both the cases - ActiveDesktop is enabled and disabled?
3. FYI, I downloaded Virtual Desktop manager from http://www.microsoft.com/windowsxp/downloads/powertoys/xppowertoys.mspx. I can change the wall paper in a desktop, but when I switch between desktop it doesnt seem remember and restore the wall paper that I changed. Have you used this, any idea why it doesnt work, is it a bug?

thanks!

char[] to cstring

Member 227165530-Jan-06 23:38

30-Jan-06 23:38

convert char[] to cstring

Thanks in Advance

Owner drawn30-Jan-06 23:45

30-Jan-06 23:45

char str[] ="I am a good boy";

CString str1 = str;
MessageBox(str);

CString str1;
str1 = str;
MessageBox(str);

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Member 227165530-Jan-06 23:57

30-Jan-06 23:57

Thank u for ur responce

i am sorry , i need to assign a array element

CString s[10]
char ch[]
-
s[i]=ch

any how thanks a lot

Owner drawn31-Jan-06 0:00

Re: char[] to cstring [deleted]

31-Jan-06 0:00

ptr_Electron wrote:
i am sorry , i need to assign a array element

So what

char str[] ="Owner drawn is a good boy";
CString str1[10];
str1[0] = str;
MessageBox(str1[0]);

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toxcct31-Jan-06 0:20

toxcct

31-Jan-06 0:20

sorry, misunderstood...

the guy might refer to CString[^] doc anyway...

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-- modified at 6:24 Tuesday 31st January, 2006

Re: char[] to cstring(edited)

Owner drawn31-Jan-06 0:21

31-Jan-06 0:21

>>the guy might refer to CString[^] doc anyway...

Yeah.

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Member 227165530-Jan-06 23:59

30-Jan-06 23:59

is the same way to do with CString array

Thank in Advance

Owner drawn31-Jan-06 0:01

31-Jan-06 0:01

I answered to your previous post. You can look there.

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Member 227165531-Jan-06 0:32

Getting Hex value from Edit box ?

31-Jan-06 0:32

Thank u very much

kk_vp30-Jan-06 23:09

30-Jan-06 23:09

Hi,

I have a dialog application where user enters hex values in CEditbox.
Is there a editbox where we can create a member variable of type HEX??
for CEDIT, only int, long, byte etc are possible but not HEX.
the hex value can range from 0x00 to 0xFFFFFFFFFFFFFFFF
in this case.

Any clues on how to do this???? Confused | :confused:

- KK

Owner drawn30-Jan-06 23:13

30-Jan-06 23:13

Sub class CEdit and make a CHexEdit for yourself.

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kk_vp30-Jan-06 23:34

30-Jan-06 23:34

I thought about that, but not sure of how to do that. Is there a code I can refer or has someone done something similar to this?

- KK

Owner drawn30-Jan-06 23:38

30-Jan-06 23:38

http://www.codeproject.com/editctrl/chexedit.asp[^]

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kk_vp30-Jan-06 23:44

30-Jan-06 23:44

I did check that.
It validates the user entry and makes sure that user enters valid hex code, but does not solve my problem. It does not have a member variable which can give me hex value.

- KK

Owner drawn30-Jan-06 23:54

30-Jan-06 23:54

Now common man...

If you have the hex code in the edit box can't you just get the text from the text box. That's all you have to do. Lol Hmmm | :|

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kk_vp31-Jan-06 0:11

31-Jan-06 0:11

Thank you for your time, although I was looking for help from someone who can give easy to follow help for beginers too !

- KK

Owner drawn31-Jan-06 0:14

31-Jan-06 0:14

There are hordes of articles in CP related to CEdit. Just search for them trust me you won't be disappointed.

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David Crow31-Jan-06 4:06

David Crow

31-Jan-06 4:06

kk_vp wrote:
It validates the user entry and makes sure that user enters valid hex code...

Actually it says it will do that but it is missing several key points.

kk_vp wrote:
...It does not have a member variable which can give me hex value.

What do you mean by this?

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toxcct31-Jan-06 0:34

toxcct

31-Jan-06 0:34

there's no particuliar type to store hexadecimal values.
the answers of Owner Drawn are good enough. if you'r not satisfied, please detail the points you need help on, because nobody will do the whole job for you...

TOXCCT >>> GEII power
[toxcct][VisualCalc 2.20][VCalc 3.0 soon...]

-- modified at 8:09 Tuesday 31st January, 2006

Owner drawn31-Jan-06 1:07