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Hi,
I'm making this DLL that has about 60 exported functions. Some of them work perfectly in the client app, but not all. I've discovered that it's the functions with 'const std::wstring&' parameters that don't work properly. When I compile the client app, I get the following error:
unresolved external symbol "bool __cdecl TASFileDup(class std::basic_string,class std::allocator > const &)"
I have no idea why some of the functions work and others don't. I get no errors or warnings when I compile the DLL.
I've tried writing 'using namespace std' in the client app, but that had no effect. Any suggestions?
Jarle
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If you are not aware of it already: If you pass or return any of these classes by value you must use the DLL version of the CRT (mixing heaps spells d-i-s-a-s-t-e-r).
My guess why only some functions are failing is that it's just these functions that make use of not yet instantiated class templates.
In my experience the std:: types unfortunately fits like a foot in a glove when mentioned in module (such as DLL) interfaces. What you have experienced now is just the tip of the iceberg.
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Can someone help me in the right direction? I am really stuck trying to create my own linked list base class.
The problem shows up when I derive a class from the linked list base class.
Because within the baseclass I want to manage the list and add new nodes, but these are forced be like ' new CBaseClassList'. So that derived classes do not truly inherit the linked list ability, since only base class nodes are added. I hope I made my problem clear. Let my try to explain better in simple code:
class CBaseClassList
{
CBaseClassList *liststart_node;
AddNode();
int basedata;
}
CBaseClassList::AddNode()
{
liststart_node = new CBaseClassList();
}
class CDerivedClass : public CBaseClassList
{
int deriveddata;
DoStuff();
}
CDerivedClass::DoStuff()
{
// Adding a new node from within the derived class will only create
// a node based on the baseclass!!
// So I am not able to use CDerivedClass datamembers
AddNode();
// OK:
liststart_node->basedata = 10;
// impossible:
liststart_node->deriveddata
}
Please note that I really want the baseclass to stay as absract as possible so that I neednt create multiple linked list code in my project and that I can use it for pretty much anything. Just one baseclass linked list to derive and inherrit linked list ability from. I do know about STL, but I need my own baseclass list construction in this project (in relation to fast code).
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Bug wrote:
do know about STL, but I need my own baseclass list construction in this project (in relation to fast code).
In relation to fast code, you should use STL anyway. Unless this is kind of homework, of course. 
Tomasz Sowinski -- http://www.shooltz.com
- It's for protection
- Protection from what? Zee Germans?
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Why are you not using a template class?
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I'm trying using templates now. Thanks.
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I have a thread function and I define it as global function:
This function get the focused window and change the position of it.
BOOL bdown = false ;
UINT ThreadFunc(LPVOID pparam)
{
WINDOWINFO info;
HWND hwnd;
DWORD dword;
hwnd = (HWND)GetForegroundWindow();
GetWindowThreadProcessId( hwnd , &dword);
AttachThreadInput( dword , GetCurrentThreadId() ,true);
hwnd = GetFocus();
if(hwnd != NULL)
GetWindowInfo( hwnd ,&info );
else
{
hwnd = (HWND)GetForegroundWindow();
GetWindowInfo( hwnd ,&info );
}
if(hwnd!=NULL)
{
int x = info.rcWindow.left;
int y = info.rcWindow.top;
int width = (info.rcWindow.right-info.rcWindow.left);
int height = (info.rcWindow.bottom-info.rcWindow.top) ;
if(bdown)
y -= 90;
else
y += 90;
SetWindowPos(hwnd , HWND_NOTOPMOST , x , y , width ,height , SWP_SHOWWINDOW);
if(bdown)
bdown = false;
else
bdown = true;
Sleep(1000);
}
return 0;
}
I start thread in my OnInitDialog of my class like this:
AfxBeginThread(ThreadFunc, 0);
The problem is that if when I call the function without starting thread it works and change the position but when I start the thread nothing happend.also when I debug my application it change the postion for one time and it seems that it does not called another time.Any idea?
Mazy
"The more I search, the more my need
For you,
The more I bless, the more I bleed
For you."The Outlaw Torn-Metallica
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Your thread function executes once and then returns - the thread finishes. Some kind of loop is missing.
Tomasz Sowinski -- http://www.shooltz.com
- It's for protection
- Protection from what? Zee Germans?
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Yes,thank you man. 
Mazy
"The more I search, the more my need
For you,
The more I bless, the more I bleed
For you."The Outlaw Torn-Metallica
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Hi,
My application does not have a title bar due to space constraints.
I need to add the minimize, maximize and close buttons (which are normally on the title bar) to the menu bar.
Any ideas on how I can do this would be greatly appreciated.
Thanks.
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you could draw some bitmaps and import them to your resources and use the CButtonST class to give the button a normal look. Take a look the follwing article about CButtonST http://www.codeproject.com/buttonctrl/cbuttonst.asp
Hope this helps...
Best Regards
Sonu Kapoor
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I have searched a single tutorial which will explain me a simple device driver in vC++.
But I could'nt found any tutorial as such.
Does any body knows
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Yes, but unless you tell us exactly what operating system you want to do it for it's impossible to answer.
For at least NT drivers you can download the DDK from Microsft. Not that it's probably well over 100MB.
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yes i want this on windows nt or 2000
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Hi,
Anyone know how I can integrate MSDN Library with VC++.NET so when I press F1 the MSDN is to be open (not the local help in VC++.NET )??
Bye,
Orbital^
...the night is long ... but not long enought to do some real coding ...
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Tools...Options...Help...External Help
Nish
Regards,
Nish
Native CPian.
Born and brought up on CP.
With the CP blood in him.
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I know that ... but it open 'Microsoft Document explorer' with "MSDN Library - Visual Studio .NET" open.
I want to open " MSDN Library - October 2001" with "MS HTML Help"
Thanx
Bye,
Orbital^
...the night is long ... but not long enought to do some real coding ...
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You need the newest MSDN Library. The old ones don't integrate into VS.NET
- Anders
Money talks, but all mine ever says is "Goodbye!"
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Thanx ... I've just activate my subscription a few days ago ... do you hapen to know if they will send my the new MSDN Library as an update???
Bye,
Orbital^
...the night is long ... but not long enought to do some real coding ...
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Orbital^ wrote:
do you hapen to know if they will send my the new MSDN Library as an update
As far as I know they do...
- Anders
Money talks, but all mine ever says is "Goodbye!"
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I have made this function that takes a pointer to a ITEMIDLIST as a parameter that points to a folder and then loops through the items in the folder. If it is a file it adds it to the listview control, and if it is a folder it calls itself. But when it encounters a folder and calls itself the first time, the EnumObjects function fails. The ITEMIDLIST i pass in the function is the return value of the SHBrowseForFolder function. Anyone know what's wrong? Here's the code:
void AddFilesFromFolder(ITEMIDLIST *pIdl)
{
if (pIdl)
{
IShellFolder *pBrowse = NULL;
LPENUMIDLIST pFolder = NULL;
LPMALLOC pMalloc = NULL;
ITEMIDLIST *pNewId = NULL;
STRRET strDispName;
LVITEM lvItem;
RECT rMain;
RECT rAdd;
char szCurrentFile[MAX_PATH+1+5];
char szFolderPath[MAX_PATH+1];
DWORD pActual = 0;
DWORD dwAttrib;
IShellFolder *CurrentFolder;
HRESULT err;
err = SHGetDesktopFolder (&CurrentFolder);
if (err == NOERROR)
{
SHGetMalloc(&pMalloc);
CurrentFolder->BindToObject(pIdl, NULL, IID_IShellFolder, (LPVOID*)&pBrowse);
pBrowse->GetDisplayNameOf(pIdl, SHGDN_INFOLDER, &strDispName);
err = pBrowse->EnumObjects(NULL, SHCONTF_FOLDERS | SHCONTF_NONFOLDERS | SHCONTF_INCLUDEHIDDEN, &pFolder);
if (err == NOERROR)
{
SHGetPathFromIDList(pIdl, szFolderPath);
lvItem.mask = LVIF_IMAGE | LVIF_TEXT;
while (pFolder->Next(1, &pNewId, &pActual) != S_FALSE)
{
dwAttrib = SFGAO_FOLDER;
pBrowse->GetAttributesOf(1, (LPCITEMIDLIST*)&pNewId, &dwAttrib);
if (!(dwAttrib & SFGAO_FOLDER))
{
pBrowse->GetDisplayNameOf(pNewId, SHGDN_INFOLDER, &strDispName);
PathCombine(gszPath, szFolderPath, strDispName.cStr);
GetID3();
FillInfo();
ListAddItem();
}
if (dwAttrib & SFGAO_FOLDER)
{
pBrowse->GetDisplayNameOf(pNewId, SHGDN_INFOLDER, &strDispName);
AddFilesFromFolder(pNewId);
}
}
pMalloc->Free(pNewId);
pMalloc->Release();
gbFileOpen = true;
pFolder->Release();
}
CurrentFolder->Release();
}
}
}
Thankyou all!
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I think the problem is that the pidls you get from EnumObjects() are realative to the folder
you are enumerating and your function is expecting a complete pidl.
(Make a recursive function that takes an IShellFolder * arg instead)
/Magnus
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