Re: converting LPCSTR to char* - C / C++ / MFC Discussion Boards

sarat4-Dec-07 23:20

4-Dec-07 23:20

If u have compiled your program with UNICODE and _UNICODE defined, then LPTSTR will automatically become LPWSTR (Long pointer to a wide string) u cant assign this to char* but u can assign this to a variable of type wchar_t*.

after using wchar_t* use swprintf() to get proper output.

Re: converting LPCSTR to char*

Cedric Moonen4-Dec-07 23:33

Cedric Moonen

4-Dec-07 23:33

Did you read his message ? He was talking about LPCSTR and not LPTSTR.

Cédric Moonen
Software developer

Charting control [v1.2]

Re: converting LPCSTR to char*

ThatsAlok4-Dec-07 23:34

ThatsAlok

4-Dec-07 23:34

Cedric Moonen wrote:
LPTSTR.

you forget to bold T i.e. LPTSTR

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Re: converting LPCSTR to char*

sarat4-Dec-07 23:40

sarat

4-Dec-07 23:40

ohh sorry then If you use T2A macro, it will work in UNICODE and MBCS.
please go through T2A macro

Re: converting LPCSTR to char*

Cedric Moonen5-Dec-07 0:09

Cedric Moonen

5-Dec-07 0:09

Why would it be usefull to use the T2A macro ? A LPCSTR is a const char*.
I think you should read some documentation about the different string types to better understand the different namings.

Cédric Moonen
Software developer

Charting control [v1.2]

Re: converting LPCSTR to char*

sarat5-Dec-07 0:21

sarat

5-Dec-07 0:21

correct
then why she wants to do that?

Re: converting LPCSTR to char*

Cedric Moonen5-Dec-07 0:52

Cedric Moonen

5-Dec-07 0:52

Probably because the compiler complains about the constness.

Cédric Moonen
Software developer

Charting control [v1.2]

Re: converting LPCSTR to char*

sarat5-Dec-07 1:58

sarat

5-Dec-07 1:58

neha
can u mention what exactly u wanna do and where u r facing problem
eplain the scenario

how to set transparent color for a perticular color

sarat4-Dec-07 21:01

sarat

4-Dec-07 21:01

hi i need to set transparent color for a perticular color so that when i load bit map the color will be transparent...

i am working with mfc tool bar controls

how to set default transparent color for a perticular color
please let me know

thanks in advance

Re: how to set transparent color for a perticular color

Cedric Moonen4-Dec-07 21:13

Cedric Moonen

4-Dec-07 21:13

What are you doing exactly ? Where are you using that bitmap and how do you 'display' it ?

Cédric Moonen
Software developer

Charting control [v1.2]

Re: how to set transparent color for a perticular color

sarat4-Dec-07 21:42

sarat

4-Dec-07 21:42

thanx for the reply

i have a bit map lets say smily having red color arrond the smily
i wanna put that bit map on the tool bar button
but i dont wanna disply the red color
i know we can make that red color as transparent color so that it wont be displyed ... but how to set red color as transparent color

Re: how to set transparent color for a perticular color

GauranG Shah5-Dec-07 0:43

GauranG Shah

5-Dec-07 0:43

use SetlayeredWindowAttributes() API to set the red color transparent.

might be below link will help you.
http://www.codeproject.com/KB/cpp/Greetings.aspx[^]

[ Screen Capture ][ Tool Tip ][ Muliple Desktops ][Greeting Card ]

Re: how to set transparent color for a perticular color

Mark Salsbery5-Dec-07 5:57

Mark Salsbery

5-Dec-07 5:57

For button bitmaps in an MFC toolbar, you can use a masked
imagelist to hold the bitmaps.

    // in constructor
    // transparent color is bright green
    m_ToolBarImageList.Create(IDB_BITMAP1, 16, 1, RGB(0x00,0xFF,0x00));
...
    // some time after m_ToolBar's is created
    m_ToolBar.GetToolBarCtrl().SetImageList(&m_ToolBarImageList);

Mark Salsbery
Microsoft MVP - Visual C++

Java | [Coffee]

Re: how to set transparent color for a perticular color

sarat5-Dec-07 19:59

sarat

5-Dec-07 19:59

Thanx a lot it works fine

Message Mapping Problem

Md. Mazharul Islam Khan4-Dec-07 20:57

Md. Mazharul Islam Khan

4-Dec-07 20:57

I wrote a class CCamCtrl. I use a Custom message WM_CAPTURE_IMAGE and used message mapping. A dll is to post message. I think dll does not post messsage, sothat OnCaptureData(WPARAM wParam, LPARAM lParam ) event can't be called.

Are there any problem in my code or in dll.

here i mention that dll works well for dialog based application.
Can anyone help me?

Thanks in Advance
Mazhar

header file
class CCamCtrl : public COleControl
{
//some code
///
///

// Message maps
//{{AFX_MSG(CCamCtrl)
afx_msg void OnCaptureData(WPARAM wParam, LPARAM lParam );
afx_msg void OnShowWindow(BOOL bShow, UINT nStatus);
afx_msg void OnLButtonDown(UINT nFlags, CPoint point);
afx_msg void OnTimer(UINT nIDEvent);
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};

in cpp i wrote
BEGIN_MESSAGE_MAP(CCamCtrl, COleControl)
//{{AFX_MSG_MAP(CCamCtrl)
ON_MESSAGE(WM_CAPTURE_IMAGE,OnCaptureData)
ON_WM_SHOWWINDOW()
ON_WM_LBUTTONDOWN()
ON_WM_TIMER()
//}}AFX_MSG_MAP

ON_MESSAGE(OCM_COMMAND, OnOcmCommand)
ON_OLEVERB(AFX_IDS_VERB_PROPERTIES, OnProperties)

END_MESSAGE_MAP()

VM Size

Programm3r4-Dec-07 20:23

Programm3r

4-Dec-07 20:23

Hi all,

I would like to know in general what causes a large amount of virtual memory to be used when creating an application. I.E What within the application causes a large amount of virtual memory to be used.

Thanks in advance
Regards,

The only programmers that are better that C programmers are those who code in 1's and 0's Green Alien | [Alien]

Programm3r
My Blog: ^_^

Re: VM Size

baerten4-Dec-07 21:11

baerten

4-Dec-07 21:11

If you create a lot of classes with'in huge memory allocation. And you don't release it.
Or if bitmaps are loaded.

I sawed already that the visual studio debugger don't frees the memory at realtime.
If you create a view, close it, create, close, ...
then you get not the initial memory size of your application

Re: VM Size

Programm3r5-Dec-07 0:21

Programm3r

5-Dec-07 0:21

Thank you for your response

Regards

The only programmers that are better that C programmers are those who code in 1's and 0's Green Alien | [Alien]

Programm3r
My Blog: ^_^

about the article in MSDN , "Adding Multiple Views to a Single Document"

followait4-Dec-07 20:20

followait

4-Dec-07 20:20

http://msdn2.microsoft.com/en-us/library/s199bks0(VS.80).aspx#vcconswitchingfunctiona4[^]

I think it's not necessary.
The sample code in CDocument::AddView has already given a better way, also an MFC way, and more general. It applies to CView CFormView etc.

Re: about the article in MSDN , "Adding Multiple Views to a Single Document"

Nelek4-Dec-07 22:28

Nelek

4-Dec-07 22:28

And... the relevance of this message is.... ?????

If it is related with your old post... why the hell didn't you make what toxxct recommended you?

And BTW... I used the MSDN article as well to make my multiple views... and it didn't work right just with that they explain. If there has been no updates since then... you will have some problems.

Greetings.

--------
M.D.V. Wink | ;)

If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
Help me to understand what I'm saying, and I'll explain it better to you
“The First Rule of Program Optimization: Don't do it. The Second Rule of Program Optimization (for experts only!): Don't do it yet.” - Michael A. Jackson

Re: about the article in MSDN , "Adding Multiple Views to a Single Document"

followait4-Dec-07 22:41

followait

4-Dec-07 22:41

If the article is not good, it will wastes developer's time potentially.
If it is right, I'd like to learn about it.

Re: about the article in MSDN , "Adding Multiple Views to a Single Document"

wira1guys4-Dec-07 23:45

wira1guys

4-Dec-07 23:45

I don't know anything about this.

But can u tell me the tutorial about it (CDocument::AddView), since I am a beginner in C++.
I am learning about create multi in MDI CFormsView.
Thanks.

Re: about the article in MSDN , "Adding Multiple Views to a Single Document"

Nelek4-Dec-07 23:57

Nelek

4-Dec-07 23:57

I have already answered that more than once, but as now (at least for me) the perma link are not working, you should use the search by yourself.

Use "CFormView" and my nick in the options. The messages are quite old. I answered in three main points (different messages) How to add a view (2x) and how to close a view(1x)

Greetings.
--------
M.D.V. Wink | ;)

Re: about the article in MSDN , "Adding Multiple Views to a Single Document"

followait5-Dec-07 0:23

followait

5-Dec-07 0:23

Check msdn for CDocument::AddView

There is a piece of sample code, it is enough to do the work. I've just used it in my project, One doc with three formviews, very well.

Re: about the article in MSDN , "Adding Multiple Views to a Single Document"

David Crow5-Dec-07 2:42

David Crow

5-Dec-07 2:42

And why are you announcing that here? Do you think we have control over MSDN content? If something is indeed wrong, let MSDN know, not us. Roll eyes | :rolleyes:

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