C / C++ / MFC Discussion Boards

"clear" the transparent background rendering of an ActiveX control

bancavo5-Oct-04 5:54

5-Oct-04 5:54

I am looking to "clear" the transparent background rendering of my ActiveX control when the OnDraw(...) function is called.

Here is my OnDraw(...) function:

pdc->SetBkMode(TRANSPARENT);
pdc->FillRect(rcBounds, CBrush::FromHandle((HBRUSH)GetStockObject(HOLLOW_BRUSH)));

with the HOLLOW_BRUSH i get the transparent background. If i use Animations in the ActiveX Control
the background don't clear (redrawn).

Has anyone ideas?

thanks

bancavo

Re: "clear" the transparent background rendering of an ActiveX control

Ryan Binns5-Oct-04 18:28

Ryan Binns

5-Oct-04 18:28

bancavo wrote:
pdc->FillRect(rcBounds, CBrush::FromHandle((HBRUSH)GetStockObject(HOLLOW_BRUSH)));

This call does nothing at all. You're filling a rectangle with a brush that has no colour. So no, the background won't get cleared or redrawn. You'll have to draw it some other way.

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: "clear" the transparent background rendering of an ActiveX control

yaseeen5-Oct-04 22:16

yaseeen

5-Oct-04 22:16

thanks for your answer.

oh yes thats correct, sorry Roll eyes | :rolleyes:

I have an ActiveX with animated ellipses and rects etc.

I would like to merge my ActiveX in MS Powerpoint on a whole foil. Afterwards I would like to draw MS Powerpoint Items on it. Without a transparent background I cannot see the objects, because if the ActiveX get focus the the Items slips into the background.

It brings also nothing to change the order of the Items and the ActiveX in MS Powerpoint.

I need a transparent ActiveX Background, and that should be cleared if i call for example OnDraw()

I don't know how can i do this.
I would be very grateful for suggestions!

Re: "clear" the transparent background rendering of an ActiveX control

Ryan Binns6-Oct-04 0:58

Ryan Binns

6-Oct-04 0:58

yaseeen wrote:
I need a transparent ActiveX Background, and that should be cleared if i call for example OnDraw()

I'm not sure if you can do this. By definition, a transparent background is not drawn.

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"

Is a CString char a numer or a char…?

anderslundsgard5-Oct-04 5:28

anderslundsgard

5-Oct-04 5:28

I would like to know if the first sign in a CString is a char or a number (e.g. ‘c’ or ‘3’)
Any tip how to find it easy…

_____________________________

...and justice for all

APe

Re: Is a CString char a numer or a char…?

BlackDice5-Oct-04 5:43

BlackDice

5-Oct-04 5:43

try IsDigit() and IsAlpha()

[insert witty comment here]

bdiamond Sleepy | :zzz:

Re: Is a CString char a numer or a char…?

anderslundsgard5-Oct-04 20:06

anderslundsgard

5-Oct-04 20:06

where do you find that IsDigit?
Is it a member of CString? Can't find it...

_____________________________

...and justice for all

APe

Re: Is a CString char a numer or a char…?

toxcct5-Oct-04 20:31

toxcct

5-Oct-04 20:31

<font style="color:blue;">#include</font> <font style="color:gray;"><string.h></font>
<font style="color:blue;">int</font> isdigit()
<font style="color:blue;">int</font> isalpha()
<font style="color:blue;">int</font> isalnum()
<font style="color:blue;">int</font> isprint()
<font style="color:green;">// And so many others...</font>

Do you know the standard library of C ? Confused | :confused:

And do you know this useful thing that we usually call MSDN ??? Confused | :confused:

You'd better look at this Wink | ;)

TOXCCT >>> GEII power

Re: Is a CString char a numer or a char…?

David Crow5-Oct-04 8:42

David Crow

5-Oct-04 8:42

While bdiamond most likely provided you with the answer, you might also want to know that the first character in a CString object is accessed via the [] operator, like:

CString str;
if ('c' == str[0])
    ...

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Activex in MFC DLL

p.malavolta5-Oct-04 5:23

p.malavolta

5-Oct-04 5:23

Hi, how can I use ACTIVEX control in a MFC dll if the main application is not MFC based ?

How to register environment variables for vc++ 6.0

nirmit5-Oct-04 4:38

nirmit

5-Oct-04 4:38

I want to registerenvironment vaiable for my project Sigh | :sigh:

Re: How to register environment variables for vc++ 6.0

toxcct5-Oct-04 4:47

toxcct

5-Oct-04 4:47

<font style="color:blue;">int</font> main (<font style="color:blue;">int</font> argc, <font style="color:blue;">char</font>* argv[], <font style="color:blue;">char</font>* envp[]) {
    <font style="color:green;">//...</font>
}

where envp is a table with the names of the environment variables...

TOXCCT >>> GEII power

Re: How to register environment variables for vc++ 6.0

David Crow5-Oct-04 5:01

David Crow

5-Oct-04 5:01

For user-specific variables, use:

HKEY_CURRENT_USER\Environment

For system-wide variables, use:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Environment

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Re: How to register environment variables for vc++ 6.0

2249175-Oct-04 18:08

224917

5-Oct-04 18:08

"HKEY_CURRENT_USER\Volatile Environment"
I think this was also there Confused | :confused:

There is no spoon.

mail

Re: How to register environment variables for vc++ 6.0

4apai5-Oct-04 6:56

4apai

5-Oct-04 6:56

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dllproc/base/setenvironmentvariable.asp

4apai
There're no impossible tasks. There're tasks that required infinite period of execution time.

my exe file not working properly outisde the vc++ environment

nirmit5-Oct-04 4:24

nirmit

5-Oct-04 4:24

I developed a simple program in vc++.It stores data in a .dat file.the exe stores data properly when i run the program under vc++ environment.But as soon as i link the exe on the start menu the exe runs,but it not stores data in .dat file.Give me a solution of this problem.

Re: my exe file not working properly outisde the vc++ environment

David Crow5-Oct-04 4:35

David Crow

5-Oct-04 4:35

It sounds like the application is using a relative path instead of an absolute path to the .dat file.

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Re: my exe file not working properly outisde the vc++ environment

toxcct5-Oct-04 4:37

toxcct

5-Oct-04 4:37

do you put into the start menu a shortcut to your program, or the executable itself???

TOXCCT >>> GEII power

Re: my exe file not working properly outisde the vc++ environment

Antony M Kancidrowski5-Oct-04 4:58

Antony M Kancidrowski

5-Oct-04 4:58

Have you set the working directory accordingly? I assume your dat file is in the working directory.

Ant.

I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Williams (Little Britain)

sending array/pointer to function - what's the difference?

BlackDice5-Oct-04 3:54

BlackDice

5-Oct-04 3:54

usually when I want to send an array to a function that is declared like this:

int array[10];

the function header is like this:

void DoArray(int* array, int nCount);

then I still reference the array indexes like it was a regular array. But I've also seen this:

void DoArray(int array[], int nCount)

what's the difference, and is one better than the other?

[insert witty comment here]

bdiamond Sleepy | :zzz:

Re: sending array/pointer to function - what's the difference?

toxcct5-Oct-04 4:21

toxcct

5-Oct-04 4:21

no difference for me

in all cases, int array[]; and int *array; declares a pointer to signed integers...

TOXCCT >>> GEII power

Re: sending array/pointer to function - what's the difference?

Yulianto.5-Oct-04 19:34

Yulianto.

5-Oct-04 19:34

toxcct wrote:
no difference for me

Same here

<italic>Work hard and a bit of luck is the key to success.

You don`t need to be genius, to be rich.

Re: sending array/pointer to function - what's the difference?

David Crow5-Oct-04 4:21

David Crow

5-Oct-04 4:21

It helps if you remember that the following two statements are the same:

array[5];
*(array + 5);

See here for more.

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Re: sending array/pointer to function - what's the difference?

Henry miller5-Oct-04 5:10

Henry miller

5-Oct-04 5:10

In the end none.

However for the sake of other programers, it is nice to see

void DoArray(int array[],int nCount);

as that tells everyone you intend to use an array. int * can have many meanings other than an array. In example code like this it is obvious, but in the real world it is more like to look like:

returnValueName doSomeStuff(struct names validNames[],int count, OperationCodeList Op)

Now consider the case where names is known to be a linked list, if you had used the *validNames form maintainers (who have to be in and out quickly) will not realize something strange is going on.

Of course I would expect a comment someplace that exmplains doSomeStuff takes an array of linked lists, each list covers one gender. But will anyone recall in latter years that this function is mostly used to cover aliens from phlanix-minor who have 3 distint genders.

Unfortunatly coming up with a real world type example is tough, but I hope you can enjoy the above, and see the point.

Re: sending array/pointer to function - what's the difference?

BlackDice5-Oct-04 5:38

BlackDice

5-Oct-04 5:38

thank you all for your help!!!

[insert witty comment here]

bdiamond Sleepy | :zzz:

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