I am trying to get a GUI window to pop up. It says inconsistent annotation for winmain. How do I fix this code?

Question

0.00/5 (No votes)

See more:

C++

#include <windows.h>
#include <winuser.h>

LRESULT CALLBACK WindowProcedure(HWND, UINT, WPARAM, LPARAM);

int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, LPSTR args, int nCmdshow) 
{
    WNDCLASSW wc;

    wc.hbrBackground = (HBRUSH)COLOR_WINDOW;
    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
    wc.hInstance = hInst;
    wc.lpszClassName = L"myWindowClass";
    wc.lpfnWndProc = WindowProcedure;
    RegisterClass(&wc);
    return 0;
    CreateWindowW(L"myWindowClass", L"My Window", WS_OVERLAPPEDWINDOW | WS_VISIBLE, 100, 100, 500, 500, NULL, NULL, NULL, NULL);
		
    return 0;
}

LRESULT CALLBACK WindowProcedure(HWND hWnd, UINT msg, WPARAM wp, LPARAM lp)
{
}

What I have tried:

I tried the above code. I am trying to get it to work.

Posted 22-Apr-20 8:40am

Member 13010616

Updated 22-Apr-20 10:09am

Rick York

v2

Add a Solution

2 solutions

Solution 1

It appears to me you have excessive return statements. Increase the warning level on your compiler so it will tell you about that. You should have received a warning because the CreateWindow call is unreachable.

Remove the first return 0 statement so you have just one at the end of the function.

-edit- that is not the exact cause of your error but searching for "inconsistent annotation winmain" will give you lots of hints.

Posted 22-Apr-20 9:22am

Rick York

Updated 22-Apr-20 9:29am

v2

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

steveb · Accepted Answer · 2020-04-22T10:10:00

You forgot the message pump in your WinMain

C++

while ( GetMessage(&msg, NULL, 0, 0) )
{
    TranslateMessage(&msg);
    DispatchMessage(&msg);
}
return msg.wParam;

and in your WindowProcedure you forgot the return value

C++

return DefWindowProc(hWnd, message, wParam, lParam);

WinMain does not return until window is destroyed