What is desktop window class like?

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What is the feature of desktop window class?
//Why do I have to type the sentence which is at least 30 charachers?(Has been solved.)
Here is my code.

#include <stdio.h>
#include <windows.h>
#pragma comment (lib, "user32.lib")
#include <Psapi.h>
#pragma comment(lib,"Kernel32.lib")

main(){
	FILE *fp = fopen("C:/windowLog.txt", "a");
	HWND desktopWindow=GetDesktopWindow();
	fprintf(fp, "Handle of Desktop window is%x\n", (unsigned int)desktopWindow);
	CHAR dName[MAX_PATH] = { 0 };
	GetWindowTextA(desktopWindow, dName, MAX_PATH);
	fprintf(fp, "Title of desktop window is %s\n", dName);
	GetClassName(desktopWindow, dName, MAX_PATH);
	fprintf(fp, "Desktop window class is %s\n", dName);
	DWORD pid = 0;
	GetWindowThreadProcessId(desktopWindow, &pid);
	HANDLE hProcess = OpenProcess(PROCESS_ALL_ACCESS, FALSE, pid);
	CHAR path[260] = { 0 };
	GetModuleFileNameEx(hProcess, NULL, path, 260);
	fprintf(fp, "The path of the process is %s\n\n", path);
	fclose(fp);
}

The reslut of"Desktop window class" is "#32769".
Would you please tell me the details of the"window class"?

What I have tried:

I have found out the class name.
But I don't know how to find out the feature.

Posted 7-Apr-18 1:25am

quanhuang

Updated 7-Apr-18 2:49am

v2

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OriginalGriff · Answer 1 · 2018-04-07T01:45:00

Let's answer these in reverse.

Quote:
Why do I have to type the sentence which is at least 30 charachers?

To make you think about what you are asking, and to prompt you to give a reasonable amount of information. The better the info, the better your question. The better your question, the better an answer we can give!
Asking questions is a skill: it focuses your mind and what you want to know, and can often give you the answer without having to ask anyone else...

Quote:
What is the feature of desktop window class?
...
I have found out the class name.
But I don't know how to find out the feature.

So start with the official documentation: Object Class (System): MSDN[^] and you will find all you need to know.
If you want to know about a specific class (and there are no classes in C at all, it doesn't even have the concept of them) then start with google and type the name of the class followed by the language you want to use. For example "Form C#" will give you this: Form C# - Google Search[^] and the first hit in the list is the MSDN documentation for the Form class: Form Class (System.Windows.Forms): MSDN[^]

Richard MacCutchan · Answer 2 · 2018-04-07T01:37:00

Solution 1

Not sure what you are asking, but see:

About Window Classes (Windows)[^]

GetDesktopWindow function (Windows)[^]

Posted 7-Apr-18 1:37am

Richard MacCutchan