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I'm still learning about using COM objects.
I'm trying to figure out where the values of CLSID_FileOpenDialog and IID_IFileOpenDialog are defined: https://learn.microsoft.com/en-us/windows/win32/learnwin32/example--the-open-dialog-box
I couldn't find them in the included header files.
From one example I saw, I figured that I'd need .c and .h files with the interface and class GUIDs, but I couldn't find any reference of them for online.
They are declared as extern variables in ShObjIdl_core.h, which is included by ShObjIdl.h, which the example you linked to is including.
The actual values are defined in uuid.lib, which your project needs to link to, otherwise you will get linker errors when it can't resolve the variables.
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I have read many places that bits/stdc++.h contains all the header files that are useful in competitive programming, for saving time.
Can anyone give me any source for it or give the list in the of its header files?
You can open the file in the path where your all the c++ header files are kept. (Locate the file stdc++.h).
Or you can get one of the versions of the file in the link described here:
stdc++.h
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I am working on implementing a BST in c++. The project needs two applications, one to read data from a file and build the tree and save it to a file. And another application to load then query the tree for information. I am trying to find a good structure for my entire project. I am thinking the source folder will contain three .cpp files: App1.cpp, App2.cpp and main.cpp. Is this how it's usually done?
Thanks!
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OK, I have done some looking around but to nothing.
As I have been learning C++, I have been told by some to have my includes stored into the .h file is available, and by others, to keep them in the .cpp file.
My question is what is the preferred industry standard and why?
Includes in the .cpp are only included when that one file is compiled, but the includes for the .h are to included everytime it the file is invoked.
Hence putting your includes in cpp files will most likely speed up compilation (less cross-referencing)
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I am a newbie programmer in C++, I already know that I can use extern keyword to access functions and global variables on the other files in my project but the problem that I faced to, is that how can I use structs, enums placed (available in other files of my project) in my current .cpp file?
T.I.A
You should declare them in a header file, then #include them when you need them. You can still define them in a cpp file.
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I have the library called Serial.dll that containts the file Serial.def that looks like this:
EXPORTS
ValidateSerial
GenerateSerial
I want to import the function GenerateSerial in my C++ Win32 application. I searched on the internet topics about using DLLs but I can't get the idea... Can anybody help me?
The info you provided only tells two funciton names. You can obtain their address doing LoadLibrary and GetProcAddress. But to make any use of them you need to know the proper signature, and the rules for the arguments and return values.
Without documentation (or a .h file) you can't go very far.