winmain

how to make CreateProcess open new process in focus and not in background [duplicate]

由 若如初见. 提交于 2019-12-13 05:03:47
问题 This question already has answers here : How to bring window on top of the process created through CreateProcess (2 answers) Closed 5 years ago . I created a very simple Win program. it opens notepad and after 5 seconds it opens calc. the problem is that always the first program opens in background and not in focus (see the picture). the second program opens in focus. i've been wondering about this for a while and i can't figure out why it happens or how to open the first program in focus. I

Error when statically building a windows application

由 こ雲淡風輕ζ 提交于 2019-12-10 20:22:06
问题 I have an application that compiles and works fine when i dynamically link everything, but when I want to have a static build of it it will not compile. In visual studio 2010 I set the Use MFC in a Static Library option. When I do that I get this error: Error 1 error LNK2001: unresolved external symbol _wWinMain@16 LIBCMT.lib(wwincrt0.obj) I have tried adding LIBCMT.lib as an additional library, but that doesn't change anything. Any ideas on how to fix this problem? 回答1: From the message that

why doesn't winmain set the errorlevel?

由 跟風遠走 提交于 2019-12-10 13:26:06
问题 Why does this program correctly display a message box, but does not set the error level? int APIENTRY _tWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCmdLine, int nCmdShow) { MessageBox(NULL, _T("This should return 90 no?"), _T("OK"), MB_OK); return 90; } I compiled the code above to the name an executable called a.exe. The I did this in command prompt: c:\> a.exe (message box is displayed, I press ok) c:\> echo %ERRORLEVEL% 0 I get the same results if I use exit(90); right

Why does prevInstance exist in WinMain and wWinMain if it is always NULL

由 橙三吉。 提交于 2019-12-09 17:54:13
问题 Since I am a beginner, it may be a very basic question. I am starting DirectX 11, and while creating my first application, wWinMain was used, and while searching for difference between WinMain and wWinMain, i came across this parameter prevInstance. prevInstance is always null according to MSDN, and since it is always null, why does it exist (since it is logical to think that creators will not have given a useless parameter). And (quoting from the book), if you need a way to determine whether

undefined reference to `WinMain@16' collect2.exe: error: ld returned 1 exit status

由 偶尔善良 提交于 2019-12-01 02:56:58
问题 I am using eclipse CDT to test the Intel instructions and below is my program: #define cpuid(func,ax,bx,cx,dx)\ __asm__ __volatile__ ("cpuid":\ "=a" (ax), "=b" (bx), "=c" (cx), "=d" (dx) : "a" (func)); int Check_CPU_support_AES() { unsigned int a,b,c,d; cpuid(1, a,b,c,d); return (c & 0x2000000); } When I compile the above code, I get linkage error as: Info: Internal Builder is used for build gcc -O0 -g3 -Wall -c -fmessage-length=0 -o "src\\Intel.o" "..\\src\\Intel.c" gcc -o Intel.exe "src\

Undefined reference to WinMain@16 when using SDL

由 冷暖自知 提交于 2019-11-30 18:52:05
I've been having a lot of trouble getting everything working so that I can start developing on Windows, as apposed to Linux, which is what I normally use when coding. I'm having a rather bizarre issue when trying to compile an SDL program. As soon as I include the SDL library, the program refuses to compile, giving me this error: c:/mingw/bin/../lib/gcc/mingw32/4.6.2/../../../libmingw32.a<main.o>: In function 'main': C:\MinGW\msys\1.0\src\mingwrt/../mingw/main.c:73: undefined reference to 'WinMain@16' collect2: ld returned 1 exist status I am using MinGW on console. To give an example, using

undefined reference to WinMain@16 C++, SDL-2

由 馋奶兔 提交于 2019-11-30 15:53:01
问题 I've been getting the error undefined reference to WinMain@16 . To save space, here's a link to all the files currently in the project. At present, it shouldn't do much other than create a window, fill it in green and then draw a box in the corner, all the while tracking my mouse's position through the console. However, it won't build and I'm given the aforementioned error. My linker libraries are: glew32s libSDL2main mingw32 libSDL2 opengl32 glew32 I am using Codeblocks 13.12 with g++

undefined reference to WinMain@16 C++, SDL-2

由 删除回忆录丶 提交于 2019-11-30 15:06:28
I've been getting the error undefined reference to WinMain@16 . To save space, here's a link to all the files currently in the project . At present, it shouldn't do much other than create a window, fill it in green and then draw a box in the corner, all the while tracking my mouse's position through the console. However, it won't build and I'm given the aforementioned error. My linker libraries are: glew32s libSDL2main mingw32 libSDL2 opengl32 glew32 I am using Codeblocks 13.12 with g++ following the C++11 ISO C++ language standard. My PC is using windows 10 in case that's relevant. I've spent

What functions does _WinMainCRTStartup perform?

由 余生颓废 提交于 2019-11-29 01:37:10
This is part of a series of at least two closely related, but distinct questions. I hope I'm doing the right thing by asking them separately. I'm trying to get my Visual C++ 2008 app to work without the C Runtime Library. It's a Win32 GUI app without MFC or other fancy stuff, just plain Windows API. So I set Project Properties -> Configuration -> C/C++ -> Advanced -> Omit Default Library Names to Yes (compiler flag /Zl ) and rebuilt. Then the linker complains about an unresolved external _WinMainCRTStartup . Fair enough, I can tell the linker to use a different entry point, say MyStartup .

How can I write a Windows application without using WinMain?

由 南笙酒味 提交于 2019-11-28 21:27:42
Windows GUI applications written in C/C++ have 'WinMain' as an entry point (rather than 'main'). My understanding of this is that the compiler generates a 'main' function to be called by the C Runtime. This 'main' function sets up the necessary environment for the GUI and calls into 'WinMain' (specifying the instance handles etc.). In short, I believe console and GUI application startup to differ in the following way: Console application: C Runtime --> 'main' function (hand-coded) GUI application: C Runtime --> 'main' function (compiler-generated) --> 'WinMain' function (hand-coded) I would
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