I’m trying to port some code from x86 to x64. It’s a rather large code base and has survived from Visual Studio 2010. I recently ported it to Visual Studio 2019 and it build and operates fine but when I change to x64 atlcore.h refuses to compile and complains of redefinition issues and return types ..
Category : atl
I have a COM DLL "XPLib.dll" that I need to call functions from. I’m trying to use ATL::CComPtr but I don’t know where to get the information required. I don’t have any headers or documentation, just a dll. So far I’m doing this ATL::CComPtr<IXPLibVacSystemControl> pVac; hr = pVac.CoCreateInstance("CLSID_IXPLibVacSystemControl") As I’ve seen others do online, but ..
According to the ATL docs, the merging of proxy/stub code is available for DLL projects only. The part that’s confusing is that in Visual Studio (Community 2019 Version 16.10.1), when you setup an ATL project and choose to compile to an exe, allowing the merging or proxy/stub code is still available as an option (other ..
I’m trying to create a custom MIDL interface that has an HWND for one of its method parameters. According to the docs: The following OLE handles are also defined with the [wire_marshal] attribute, but only as handles within a computer since they cannot be used in remote procedure calls to other computers at this time: ..
Am using CreateWindow() API which was working correctly on VS2015 before upgrading to VS2019. After upgrading to VS2015 CreateWindow API is returning null HWND.Calling AtlAxWinInit() before CreateWindow() API as shown below. CreateControl() { AtlAxWinInit(); HWND hwndChild = CreateWindow(_T("AtlAxWin"), _T("test"), WS_CHILD|WS_VISIBLE, 0,0,0,0, hwnd,NULL, ::GetModuleHandle(NULL), NULL); } GetLastError() is returning 1407 error code which is ERROR_CANNOT_FIND_WND_CLASS :Cannot ..
I have a simple DirectShow library and i also have a client application that call functions from that library. The problem is that some functions accept BSTR as arguments, but i prefer to pass either std::string or char*. It is certain that if i use one of these types i’ll get plenty of compiler errors. ..
I have an old c++ shared library project that successfully compiled on vs2007 but fails to specific header files i have on the system. (afxdlgs.h and afxdisp.h) screenshot specific code segment I have installed all the needed visual studio compoments screenshot of vs installer And selected the installed platform components in the properties tab screenshot ..
Is there a strategy for safely allowing an ATL object to release itself in response to a Windows message or sink event? In other words, let’s say you have an ATL class that’s subclassing some windows (using a message map) and/or sinking events from COM objects (using a sink map). And you’d like the class ..
I have a class "data" containing a CString (CStringT). "data" is a member of another class and is frequently reassigned by value. The initial assignment works fine, however the second makes the application crash, although both objects have valid data. The callstack also compares two valid strings, however at some point in this process it ..
I needed to display status updates on a dialog box, and wanted to be able to send printf style formatted strings to it. In addition I would like that function to call a similar function which will add the formatted data to a log file. Assuming my Static control is called IDC_MYSTATUSBAR, the funciton looks ..
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