ReadFile
The return value of ReadFile is of BOOL type, which means the return value only indicates whether the function succeeds or fails. If the function fails, the return value does […]
Buggy RegSetValueEx
The prototype of RegSetValueExA is: LSTATUS RegSetValueExA(HKEY hKey,LPCSTR lpValueName,DWORD Reserved,DWORD dwType,const BYTE *lpData,DWORD cbData); lpData points to the data to be stored in registry. cbData is the number of first […]
QString
Today, we’ll talk about the “simplest” class of Qt, a class we use every day, a class we often do need to care about the details – QString. Despite the […]
What functions are exported when build dll using Mingw gcc?
If you build a dll using Mingw g++ like: g++ -shared -o myprogrammingnotes.dll myprogrammingnotes.cpp If __declspec(dllexport) is not present in the source file, all functions except the entry point function(DllMain) […]
How to read data in hex view in notepad++?
This is what it looks like when writing an int 0x123456 to a file viewed in hex view of notepad++. At the first glance, you cannot match it with the […]
COM Apartment
When a thread calls CoInitialize(NULL) or CoInitializeEx(NULL,COINIT_APARTMENTTHREADED), it creates a new STA apartment. The creating thread is said to be in the apartment. When the thread later instantiates a COM […]
The first function called in a COM dll when instantiating the COM object
When a program calls the COM lib function CoCreateInstance, what will happen? What work does CoCreateInstance do? How does CoCreateInstance work? The function has a parameter classid. The function looks […]
PE file format
Unlike science, technique is easy to be followed, cracked, hacked, copied, plagiarized, stolen, even surpassed by others so it need some barriers. Why are there so many evil words associated […]
When is DllMain called?
I hear the DllMain function is called when the process loads the needed dll at the start time, so I write the following code to verify this: //mydll.cpp #include <windows.h> […]
How to instantiate a COM object using Qt?
Suppose you have a myprogrammingnotes.dll that contains a COM object. You want to instantiate and use that COM object in your Qt app. How to do that? If myprogrammingnotes.dll contains […]