Unresolved external symbols __RTC_* in Windows programming tutorial
The _RTC_xxx symbols are added when the 'Basic Runtime Checks' are used; to disable them, you can go on the project properties, and set the Configuration Properties>C/C++>All Options>Basic Runtime Checks option to 'Default'. Though, as mentioned in the other answers, it looks like you have a mismatch in the C-Runtime libraries.
Admin
Updated on June 04, 2022Comments
-
Admin almost 2 years
Using Visual Studio Express 2010 I made a Windows project with the options Windows Application and Empty Project. I then tried the following code snippet from the MSDN Windows tutorials:
#include <windows.h> #include <shobjidl.h> int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE, PWSTR pCmdLine, int nCmdShow) { HRESULT hr = CoInitializeEx(NULL, COINIT_APARTMENTTHREADED | COINIT_DISABLE_OLE1DDE); if (SUCCEEDED(hr)) { IFileOpenDialog *pFileOpen; // Create the FileOpenDialog object. hr = CoCreateInstance(CLSID_FileOpenDialog, NULL, CLSCTX_ALL, IID_IFileOpenDialog, reinterpret_cast<void**>(&pFileOpen)); if (SUCCEEDED(hr)) { // Show the Open dialog box. hr = pFileOpen->Show(NULL); // Get the file name from the dialog box. if (SUCCEEDED(hr)) { IShellItem *pItem; hr = pFileOpen->GetResult(&pItem); if (SUCCEEDED(hr)) { PWSTR pszFilePath; hr = pItem->GetDisplayName(SIGDN_FILESYSPATH, &pszFilePath); // Display the file name to the user. if (SUCCEEDED(hr)) { MessageBox(NULL, pszFilePath, L"File Path", MB_OK); CoTaskMemFree(pszFilePath); } pItem->Release(); } } pFileOpen->Release(); } CoUninitialize(); } return 0; }
I got the following errors:
1>------ Rebuild All started: Project: Test05, Configuration: Debug Win32 ------ 1> Test05.cpp 1>Test05.obj : error LNK2019: unresolved external symbol @_RTC_CheckStackVars@8 referenced in function _wWinMain@16 1>Test05.obj : error LNK2019: unresolved external symbol __RTC_CheckEsp referenced in function _wWinMain@16 1>Test05.obj : error LNK2001: unresolved external symbol __RTC_Shutdown 1>Test05.obj : error LNK2001: unresolved external symbol __RTC_InitBase 1>LINK : error LNK2001: unresolved external symbol _wWinMainCRTStartup
What's going on here? Best I can tell something to do with
wWinMain
, but it is copied directly from the site.Compilers seem to be far more trouble for me than learning programming. I decided on Visual C++ after trying a few others (codeblocks mostly), but since Visual C++ seems to have the most support (or at least the majority of users) I figured it was better than never getting anywhere since they all are so unintuitive to a beginner.