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thank you - sorry for that - thought it would be more problematic to get an answer.
I don't want achieve immortality through my work - I want achieve it through not dying - Woody Allen
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Use CRegKey in <atlbase.h> .
You can find it in MSDN
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I have for about 8 hours tried to figure out what the hell is wrong with my code or math and I have reached the point where the computer is going to end up outside for the night so i've given up on it and moved on to something else.
Anyways...this this snippet of code is pretty basic math so I hope someone can tell me where i'm going wrong... 
before I go nutts...
UINT CTimelineCtrl::CalcThumbSize(UINT nVirtualWidth, UINT nVisibleWidth)
{
if(nVirtualWidth <= nVisibleWidth) return -1;
float temp = ((float)nVisibleWidth / (float)nVirtualWidth) * (float)nVirtualWidth;
return nVirtualWidth - (nVirtualWidth - percentVisible);
}
The number returned is just passed to a SCROLLINFO structure and then to SetScorllPos()
Can someone please help me with this...the math part mostly but maybe i'm not understanding the nPage property or something...
if the nMax is 100 and nPage is 100 also...the thumb size is 100% meaning no scrolling can occur...I thought it was pretty self explanatory...
Help me please before I go insane... 
Thanx
cheers
"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr
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Hockey wrote:
return nVirtualWidth - (nVirtualWidth - percentVisible);
You're actually returning percentVisible here. Is that what you want to achieve?
Tomasz Sowinski -- http://www.shooltz.com
"Yields falsehood when preceded by its quotation" yields falsehood when preceded by its quotation.
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I'm trying to calculate and return the value needed to display proportional thumbs inside scrollbars...
The function takes as arguments
1) The virtual size of the window or DC
2) The visible size of the client area
I think these are the only parameters needed to calculate the thumb size...???
"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr
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Just a few things i want to say about your posted code:
1) The first line inside the function reads:
if(nVirtualWidth <= nVisibleWidth) return -1;
But the declaration of the function is UINT, so it will return 0xFFFFFFFF. I assume you know this.
2) Second line inside the function:
float temp = ((float)nVisibleWidth / (float)nVirtualWidth) * (float)nVirtualWidth;
This long line does nothing other than:
float temp = (float)nVisibleWidth;
You first divide and then multiply the result with the same value you divided with?
3) Third and last line:
return nVirtualWidth - (nVirtualWidth - percentVisible);
For this you can simply write:
return percentVisible);<br />
<br />
This code seems to be improvable ;)<br />
<br />
:-D<br />
-Dominik
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Dominik Reichl wrote:
) The first line inside the function reads:
if(nVirtualWidth <= nVisibleWidth) return -1;
Thank you...I was wondering the scroll bars were hiding themselves automatically...I totally missed that one. 
What can I say I hate math so very much...
What steps are required then in calculating the proportional thumbsize of a scrollbar...
I supply the function
1) The virtual width
2) The visible width of client
these two variables should be more than enough to calculate the thumb size no...?
Thanx
cheers
"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr
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Hi,
I wrote a WinAPI (no MFC) app that implements IDropSource and all neccessary interfaces. I needed my app to support drag & drop. But I stuck with the WM_DROPFILES for the target, because it's way easier. But now, I'd need to accept both MOVE and COPY drops. As it seems WM_DROPFILES can't handle this (if it can, tell me!!), I'll need to do the IDropTarget interface implementation. Anybody could post some sourced to guide me? I know that I'd never write the IDropSource without the MSDN source, but I cannot find any on IDropTarget. Thanks
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I'm trying to have several instances of the same activeX embedded in a container application. This activeX is quiet complex, using message queues and graphic displays. If there's no problem on Win2000, NT or XP, the container application crashes on Win95/98/ME when it instantiates the second instance of the integrated ActiveX.
Does anybody have a clue what's happening ? (TIA)
We do not inherit the Earth from our ancestors. We borrow it from our children.
Antoine de Saint Exupéry (1900-1944)
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I am executing my own vc++ exe in VB program using CreateProcessFunction.That vc++exe has one window.When iam working on my vc++ window, I should not allow the person to interact with VB form window.He has to start interact only when i close the vc++ exe.How to do this.
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Can you disable windows in VB? Something like DisableMyFormRightNowPlz function?
Tomasz Sowinski -- http://www.shooltz.com
"Yields falsehood when preceded by its quotation" yields falsehood when preceded by its quotation.
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Try calling WaitForSingleObject with the VC's process handle
Concussus surgo.
When struck I rise.
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It must use hook?who can introduce the easy way?
Hi
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I'm thinking you could:
Use FindWindow() to find the parent window in which you listview/ctrl resides. Iterate the the child windows using GetWindow() and stop when you find the window whose class is "SysListView32" or "msctrls32" or whatever...actually use SPY++ first to determine the class name, cuz i'm unsure...
Once you have the handle to that listview window attach it to an CListCtrl object and goe nutts...extracting items just like you normally would...
cheers
"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr
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I have tried it.But it don't work.I think it maybe use pointers and other application can't access your pointer.
Hi
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Thanks!It works.
Can't I ask you another question?
I also want to get the item RECT.I use ListView_GetItemRect() in the
same way,but when run it report memory violation.I think it maybe
use other parameter.How can I do it?
Thanks again!
Hi
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Is it possible to send WM_KEYDOWN message to a window that is currently minimized, and the window reacts just as if the user presses the key on it?
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I don't know if windows filter out messages when minimized, but I think what you are trying to accomplish is possible...of course if you tried it you'd know for sure...
"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr
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hi, i tries to load a .x file but keep failing... i got this code fragment from a text...
code as follows:
HRESULT result = m_pD3D->CreateMeshBuilder(&m_pMeshBuilder);
if(result != D3DDRM_OK)
return FALSE;
result = m_pMeshBuilder->Load("model.x", NULL, D3DRMLOAD_FROMFILE, NULL, NULL);
if( result != D3DRM_OK)
{
MessageBox("Load error");
}
QUESTION 1: I realise HRESULT is a COM structure. How can i get more specific hint from result?
QUESTION 2: is there any specification to how 3ds files are converted into .x files using conv3ds.exe? the original model.x that comes with the book works just fine. But when i use other .x files i got from other sources, result != D3DRM_OK... and i cant figure out why?
QUESTION 3: I cant find documentation for ???::Load method
QUESTION 4: LPDIRECT3DRMMESHBUILDER structure documentation?
Thanx
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if the conv3ds.exe you're using does not come with the SDK version you're using I don't recommend you use as it might be an older format. IIRC the DirectX SDK comes with a MAX plugin. Look for it. It should be under the tools folder.
Do you have the Debug version installed and selected?
If you do, what does the debug spew say?
Always, always use the Debug version and look at what it says. It catches alot of useful stuff (redundant state changes for example). Also, if you have any rendering probs use REFRAST as it will allow you to separate bugs in your code from bugs in the drivers. If the problem persists when using REFRAST then the problem is in your code.
HTH
Brian Azzopardi
bibamus, edamus, cras moriemur [eat, drink, for tomorrow we die]
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norm wrote:
QUESTION 1: I realise HRESULT is a COM structure. How can i get more specific hint from result?
Add a watch with "result,hr" to see the message. (without quotes)
Concussus surgo.
When struck I rise.
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Hi!
I'm building an MFC application and I'm trying
to link a home made .lib to it. The library
uses the STL. When I try to compile the MFC
app, I get messages like these:
error LNK2005: "public: __thiscall std::basic_string<*snip*> already defined in MainFrm.obj
and
MSVCRT.lib(MSVCRT.dll) : error LNK2005: _memmove already defined in libcmt.lib(memmove.obj)
MSVCRT.lib(MSVCRT.dll) : error LNK2005: _vsprintf already defined in libcmt.lib(vsprintf.obj)
MSVCRT.lib(MSVCRT.dll) : error LNK2005: _fclose already defined in libcmt.lib(fclose.obj)
I can work around it, but I don't know what the
root problem is. I think it's releated to which
run time library the app uses. Any ideas?
Shawn
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Try changing the C Runtime libs of your application to match your lib. This way, CRT symbols won't get duplicated.
Concussus surgo.
When struck I rise.
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Most of this has nothing to do with the STL, but rather the C runtime library.
Christian
We're just observing the seasonal migration from VB to VC. Most of these birds will be killed by predators or will die of hunger. Only the best will survive - Tomasz Sowinski 29-07-2002 ( on the number of newbie posters in the VC forum )
Cats, and most other animals apart from mad cows can write fully functional vb code. - Simon Walton - 6-Aug-2002
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