Questions tagged [winapi]

The Win32 API is the core set of application programming interfaces (APIs) available in the Microsoft Windows operating systems. This tag is for questions about developing native Windows applications using the Win32 API.

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Sending and receiving files in C win32 using a socket

I have a piece of code to send and receive files on Windows with C. Is this the right way to do it? And am I guaranteed that the full file will be sent and received? Receiving function: ...
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2 votes
2 answers
80 views

A C++ WinAPI program for changing the process priority classes via PIDs - take 2

After improving the previous post, I came up with the following program: ...
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4 votes
1 answer
177 views

A C++ WinAPI program for changing the process priority classes via PIDs

(See the next iteration .) I have this program (call it, for example, prioset.exe), that asks for two command line arguments: (1) the target process PID, (2) a ...
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1 vote
1 answer
91 views

Code for setting all child controls to the default message font on Windows

If you aren't aware, if you hand-code a GUI with the Windows API you will find your controls look quite ugly by default due to their font. Running this code: ...
6 votes
1 answer
217 views

Proper way to send and receive buffer in Winsock

I have a piece of code to send and receive buffers. Is this the right way to do it? And am I guaranteed that the full buffer will be sent and received? receiving function: ...
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2 votes
1 answer
78 views

Program to check if a window is opened or not during some time interval

I'm trying to write a program that will check if a window is opened or not, during a given time. I was able to do that, but now I'm trying to make my code look cleaner. I don't like how I implement ...
0 votes
0 answers
38 views

Is it okay to remove events from subscription when there is no events

I wrote an application that when you press the start button it prints file paths to list view through events. When I press the start button it subscribes the Engine...
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5 votes
1 answer
225 views

Safe Windows API Timers for Excel

Motivation Windows API timers are notorious for crashing. I've been using them for years to workaround a nasty bug that makes User Defined Functions (UDFs) very slow in Excel when calculated in ...
0 votes
0 answers
35 views

A C WinAPI program for showing the color of the screen pixel pointed to by mouse cursor with clipboard support - follow up 2

Now it seems that I was able to make some progress with my program. See what I have: ...
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1 vote
2 answers
49 views

A small C WinAPI program moving the cursor in a circle

So the program below will move the mouse cursor in a circle all 360 degrees for 2,5 seconds (after 2,5 seconds, the program exits and the user can use his/her cursor normally). ...
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1 vote
1 answer
67 views

A C WinAPI program for showing the color of the screen pixel pointed to by mouse cursor with clipboard support - follow up

(See the previous question.) Now I have incorporated some suggestions by Barmak Shemirani. See what I have: ...
  • 26.1k
4 votes
2 answers
240 views

A C WinAPI program for showing the color of the screen pixel pointed to by mouse cursor with clipboard support

(See the follow-up question.) I have this program that shows a small window and that window shows a rectangle whose color is the same as the color of the pixel under the mouse cursor. Note that it ...
  • 26.1k
2 votes
1 answer
51 views

Windows 10 wallpaper-scroller script with Gif support

Intro: Hello, I'm a python beginner. I haven't had anyone use my code or anything. I want to improve and become a "professional python developer". I thank you for taking the time to help me ...
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2 votes
0 answers
133 views

Evaluate performance of DLL calls from VBA

While playing with a VBA project involving Windows APIs, I have noticed some odd behavior: API calls under Excel 2016/VBA7/x64 appeared to be much slower than under Excel 2002/VBA6/x32. Since I ...
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1 vote
1 answer
147 views

Win32 UI with tabs and buttons

I am making a UI library for the fun of it, and decided to use move semantics instead of pointers with new/delete. Everything is working, but I am not satisfied. Given this code: ...
3 votes
1 answer
187 views

Collecting all instances of an Office application (Excel, PowerPoint, Word)

A project of mine required me to search for certain workbooks in open instances of Excel. I found this article Code to get Excel, Word, PowerPoint from window handle which returns the applications ...
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1 vote
1 answer
96 views

C++ winapi scale2x algorithm. Is it well implemented?

taking into account the scale2x algorithm for scaling an image to 2x. Im using winapi in an Emulator. When tha scale2x algorithm is used i don't see too much difference in the image scaled2x as it ...
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2 votes
1 answer
202 views

Win32 Snake game

I made a trival snake game below to practice my C++ and Win32 programming skills. ...
1 vote
1 answer
37 views

A simple C WinAPI program for terminating processes via process image names - follow-up 4

(See the previous version here.) What's new get_last_err_msg renamed to MyGetLastErrorMessage The caller to ...
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1 vote
2 answers
371 views

Simple Win32 API Calculator in C

I've been learning C as my first language and recently I decided to learn how to create Win32 apps written in C. I Quickly realized, though, that my biggest challenge wasn't writing the Win32 app ...
2 votes
1 answer
175 views

Getting hard-drive serial number on Windows

The point is to get the serial number of one of the hard drives on Windows. My code is based on an example from MSDN. I tried to make it an exception-safe, self-contained function. It works, to the ...
2 votes
0 answers
312 views

Reading stdout and stderr of a sub process using Win32, Overlapped I/O

I'm writing C++ Windows code that will start a process, then read its stdout and stderr, separately, into buffers. If I try to just read the streams one at a time it may hang if the child process is ...
4 votes
1 answer
72 views

Trivial string-reverser in MASM64

I've been learning MASM64 over the last few days and written a simple demo, so I can get feedback on my understanding of x64 assembly programming. It's really basic: it asks the user for their name, ...
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9 votes
1 answer
1k views

Audio visualizer in C++

I have completed my first attempt of a simple music visualizer app for windows in C++ using SDL. It takes system audio and outputs the soundwave in real-time. I'd appreciate some feedback on how I can ...
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5 votes
1 answer
213 views

A simple C WinAPI program for terminating processes via process image names - folllow-up 2

(See also the previous follow-up.) Now, I seem to improve my program partially via the answer in my previous follow-up. It goes like this: ...
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2 votes
1 answer
64 views

A simple C WinAPI program for terminating processes via process image names - follow-up

(See the previous (i.e. first) version of this tool.) (See the next follow-up.) After taking into consideration all the advice by Martin R, I ended up with the following tool for terminating all the ...
  • 26.1k
5 votes
1 answer
90 views

A simple C WinAPI program for terminating processes via process image names

(Also, see the next iteration.) I have this small program for terminating processes via their respective process image names (.exe files): ...
  • 26.1k
4 votes
0 answers
89 views

Basic snake game in C

I wanted to learn C and Win32 so I thought the best way to start would be to create a simple game to get familiar with the language, so I made Snake. The games works perfectly except for sometimes ...
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4 votes
2 answers
144 views

Lowering the CPU usage when capturing and dividing screenshots into blocks using GDI+

I am trying to capture the screen content of each monitor I have and divide each captured bitmap into small blocks (wxh=128x128). I managed to do this using the GDI+ API, but my implementation (on ...
1 vote
0 answers
31 views

Wrapper function that returns cached value from WinAPI call [closed]

I am writing myself a little wrapper and I decided to cache values that shouldn't change (often or at all) for returning to the user, I'm coming from the premise that the WinAPI call is more expensive ...
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1 vote
1 answer
83 views

Internally Safe Filesystem

win_xept.hpp - a basic windows api exception ...
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4 votes
1 answer
138 views

Compare folders and find common files

I found this Powershell command useful in comparing folders and find common and different files. Since I really like C and C++, I've decided to create a program to do that. It will get all files in 2 ...
3 votes
1 answer
115 views

Check mp4 integrity in c++

I have a big collection of MP4 files and an unstable internet connection so I use this batch file to check for the files integrity. Having posted this primitive code and received valuable reviews, I ...
3 votes
0 answers
692 views

Taking a screenshot of a particular window

I've got a function which takes a screenshot of a particular window. It's important that the screenshot works whether the window is focused/covered by other windows or not, hence why I've used ...
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1 vote
1 answer
328 views

Scoped thread using modern C++

I wrote this simple scoped thread to use it as a class member to ensure the the thread running on a class method doesn't continue running after the class has been destructed. Also to spawn threads ...
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2 votes
1 answer
70 views

Recursively find files of certain types and log their paths (C++)

I've written a function that takes a list of extensions and recursively finds files of those types, and logs their paths to a text file. Usage example (finding image files in a home directory): <...
2 votes
1 answer
414 views

filesystem create a folder

I got a mixture of two languages ​​C and C ++ The code finds the folder my documents and creates additional folders in it when the program starts, I found no other way to implement this better. I ...
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3 votes
0 answers
51 views

Network connection monitor

I was recently in need of a class that checks if a computer has a valid internet connection, so I wrote one; however, I feel that there is a better way to do so and I just don't have the knowledge ...
4 votes
1 answer
67 views

This program reads from serial port, Saves this to a text file, increments file name each time it is run

I want to condense it and get rid of any noob programming errors. The code works fine but I know it's not as elegant as it could be and I really want to improve. Your advice would be brilliant! I've ...
11 votes
1 answer
400 views

Small C project: recording mouse/keyboard bot software

This is, kind of, my first programming project. It's a small project to complete first year's university programming course. The program allows the user to record his mouse/keyboard/cursor ...
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4 votes
1 answer
636 views

Windows API Declarations For Compatibility

This is an extension of my Reusable Progress Indicator post. I realised that I needed to add additional compiler constants for compatibility of the Windows API functions used in the ...
0 votes
1 answer
1k views

Simple "Connect 4" game

I made this easy game to improve my C++. The functions like NoFlicker and ShowCursor are copied from the Internet, but I made <...
2 votes
1 answer
427 views

Excel - Visual Basic For Applications - Mastermind Game

For those who are unfamiliar with the game: https://en.wikipedia.org/wiki/Mastermind_(board_game) A link to the workbook: https://github.com/Evanml2030/Excel-Mastermind Had trouble getting the ...
4 votes
0 answers
4k views

Simple C++ Console Snake Game

I'm a beginner programmer and i'm looking for interesting projects to improve my low skills. I decided to spend one evening on simple snake game in console. I made it with the help of YouTube tutorial....
6 votes
1 answer
179 views

Tic Tac Toe console game in C++ (w/graphic)

I have finished a simple Tic Tac Toe game, and I'd like if anyone was to give advice to how I could improve my code. main.cpp ...
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5 votes
2 answers
158 views

First C program: records keyboard/mouse and simulates the recording afterwards

This is my first program ever made in C. Before that I programmed just a little bit in C++ (didn't touch OOP so I did only structural programming). This is my second "project" ever made, the first "...
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13 votes
1 answer
2k views

Windows keylogger in C++

Windows keylogger in C++ Known issues: Not implementing rule of five Having to use hack to use member variables, out_, in static method Pressing caps-lock won't ...
2 votes
0 answers
190 views

VBA Array Functions: insert element, remove element

An extension to array functions I am building for my snake game. This one allows you to remove / insert particular elements. https://github.com/Evanml2030/Excel-ArrayFunctions API CALLS ...
7 votes
0 answers
176 views

Error handling function (Win32/C)

I have written the following function to be a general "error logging" solution for my Windows API projects. Basically, given a Windows system error code (a la ...
2 votes
0 answers
1k views

VBA array functions: push, pop, shift, unshift

I want to write my snake game procedurally, using as much windows call as I can so as to practice. Looking into GetAsyncKeyState to capture keyboard inputs and play sound functions. Also making a ...