Createwindow Error 0
Contents |
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business createwindowex example Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation
Createwindowex Returns Null Hwnd
Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like getlasterror 1407 you, helping each other. Join them; it only takes a minute: Sign up CreateWindowEx function fails but GetLastError() returns ERROR_SUCCESS up vote 8 down vote favorite 1 I am trying to create a simple window with C/C++ createwindow vs createwindowex using the native Windows message queue system (without .NET). I followed the MSDN tutorial and wrote some basic code that creates an empty window: void main() { HINSTANCE hinst; HWND hwndMain; WNDCLASSEX wnd; MSG msg; hinst = GetModuleHandle( NULL ); memset( &wnd, 0, sizeof( wnd ) ); wnd.cbSize = sizeof( wnd ); wnd.lpszClassName = "MainWClass"; wnd.lpfnWndProc = MainWProc; wnd.hInstance = hinst; int result = RegisterClassEx( &wnd ); if( !result ) { printf("RegisterClassEx error: %d\r\n", GetLastError() );
Createwindowex Pinvoke
} hwndMain = CreateWindowEx ( 0, //extended styles wnd.lpszClassName, //class name "Main Window", //window name WS_OVERLAPPEDWINDOW | WS_HSCROLL | WS_VSCROLL | WS_MINIMIZEBOX, //style tags CW_USEDEFAULT, //horizontal position CW_USEDEFAULT, //vertical position CW_USEDEFAULT, //width CW_USEDEFAULT, //height (HWND) NULL, //parent window (HMENU) NULL, //class menu (HINSTANCE) wnd.hInstance, //some HINSTANCE pointer NULL //Create Window Data? ); if( !hwndMain ) { printf("Oh shi- %d\n", GetLastError() ); } ShowWindow( hwndMain, SW_SHOWDEFAULT ); UpdateWindow( hwndMain ); } When I run/debug the program, CreateWindowEx returns 0 which means it failed. This triggers the error message "Oh shi- [error code]". The most confusing part is that the error message prints to console: Oh shi- 0 The error code returned by GetLastError() is 0, which is ERROR_SUCCESS! I am at a total loss; what is happening? I am so confuse... P.S. I am using Visual C++ Express 2010 on Windows 7 32-bit. I have written a Windows Procedure elsewhere but it simply returns 0 for all cases. If, however, anyone wants to see it, I will be happy to show it. I have changed the Project Default character set of my Visual C++ project to "Not Set". I should not need to prefix L to my things. Edit: added wnd.hInstance = hinst; Edit: removed the unnecessary (WNDPROC) cast Edit: added error checking for RegisterClassEx It turns out that the problem was with Visual C++
Studio 2015 products Visual Studio Team Services Visual Studio Code Visual Studio Dev Essentials Office Office Word/Excel/PowerPoint Microsoft Graph Outlook OneDrive/Sharepoint Skype Services registerclassex Store Cortana Bing Application Insights Languages & platforms Xamarin ASP.NET C++ wm_nccreate TypeScript .NET - VB, C#, F# Server Windows Server SQL Server BizTalk Server SharePoint Dynamics Programs &
Createwindowex Error 1407
communities Students Startups Forums MSDN Subscriber downloads Sign in Search Microsoft Search Windows Dev Center Windows Dev Center Explore What’s new for Windows 10 Intro to Universal http://stackoverflow.com/questions/8550679/createwindowex-function-fails-but-getlasterror-returns-error-success Windows Platform Coding challenges Develop for accessibility Build for enterprise Windows Store opportunities Docs Windows apps Get started Design and UI Develop API reference Publish Monetize Promote Games Get started UI design Develop Publish Desktop Get started Design Develop API reference Test and deploy Compatibility Windows IoT Microsoft Edge Windows Holographic Downloads Samples Support Why Windows https://social.msdn.microsoft.com/Forums/windowsdesktop/en-US/a3c296ef-d194-4555-8191-cfbf0a9452db/createwindowex-returns-null-getlasterror-returns-0?forum=windowsgeneraldevelopmentissues Dashboard Explore What’s new for Windows 10 Intro to Universal Windows Platform Coding challenges Develop for accessibility Build for enterprise Windows Store opportunities Docs Windows apps Get started Design and UI Develop API reference Publish Monetize Promote Games Get started UI design Develop Publish Desktop Get started Design Develop API reference Test and deploy Compatibility Windows IoT Microsoft Edge Windows Holographic Downloads Samples Support Why Windows Dashboard Ask a question Quick access Forums home Browse forums users FAQ Search related threads Remove From My Forums Answered by: CreateWindowEx() returns NULL, GetLastError() returns 0??? Windows Desktop Development > General Windows Desktop Development Issues Question 1 Sign in to vote This is a DLL loaded by a host application. I've spent 6 hours trying to figure out exactly why CreateWindowEx() returns NULL and GetLastError() returns 0. I wouldn't be so concerned that I'm doing something wrong if Windows would just frickin' tell me that I'm doing something wrong... but silently failing is frustrating beyond no end!Upon being load
topic ForumsMembersHelp Files Developer Journals Gallery Calendar Downloads Resources Store Classifieds Tracker Links Home For Beginners Articles All Articles Post an Article Technical Game http://www.gamedev.net/topic/502679-c-createwindowex-failed/ Programming General Programming Graphics Programming and Theory DirectX and XNA OpenGL and Vulkan Multiplayer and Network Programming Artificial Intelligence Math and Physics Mobile Development Middleware, Libraries, and Tools Virtual and Augmented Reality Creative Game Design Music and Sound Visual Arts Business Breaking into the Industry Production and Management Interviews Business and Law Event Coverage Forums All Forums Technical Game Programming General Programming error 1407 Graphics Programming and Theory DirectX and XNA OpenGL & Vulkan Multiplayer and Network Programming Artificial Intelligence Math and Physics Mobile & Console Development Build Systems & Source Control Middleware, Libraries, and Tools Virtual and Augmented Reality Creative Game Design Writing For Games Music and Sound Visual Arts Gallery Business Breaking into the Industry Business & Law Production & Management Community GDNet Lounge Coding createwindow error 0 Horrors Article Writing Comments, Suggestions and Ideas Your Announcements Hobby Project Classifieds Indie Project Showcase Community Developer Journals GDNet+ Subscriptions Gallery Store Classifieds Jobs Freelancers Hobby Projects Marketplace Newsletter » Home » Forums » The Technical Side » For Beginners Chat Watched Content New Content 0 [C++] CreateWindowEx() failed... Started by emiel1, Jul 25 2008 11:20 PM Old topic! Guest, the last post of this topic is over 60 days old and at this point you may not reply in this topic. If you wish to continue this conversation start a new topic. You cannot reply to this topic 8 replies to this topic #1 emiel1 Members -Reputation: 166 Like 0Likes Like Posted 25 July 2008 - 11:20 PM Hi, I've created code to register a window class and make a window out of it. CreateWindowEx() Failed with error code (GetLastError()) 0 (ERROR_SUCCESS); What am I doing wrong? WNDCLASSEX wc; ZeroMemory(&wc, sizeof(WNDCLASSEX)); wc.cbSize = sizeof(WNDCLASSEX); wc.style = CS_HREDRAW | CS_VREDRAW; wc.lpfnWndProc = (WNDPROC)WindowProc; wc.hInstance = GetModuleHandle(NULL); wc.hCursor = LoadCursor(NULL, IDC_ARROW); wc.hbrBackground = (HBRUSH) COLOR_WINDOW; wc.lpszClassName = TEXT("WindowClass"); RegisterClassEx(&wc); FullScreen = false;//CSettings::Get().GetIntSetting("FullScreen") == 1; GameHeigth = 800;//CSettings::Get().Get