std.stdio.File is throwing with the message of: "Access Violation" (page 2)

August 21, 2021

Re: std.stdio.File is throwing with the message of: "Access Violation"

Posted by evilrat
in reply to Ruby The Roobster

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evilrat

Posted in reply to Ruby The Roobster

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On Friday, 20 August 2021 at 21:19:09 UTC, Ruby The Roobster wrote:

int myWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int iCmdShow)
{
// ...
if(!RegisterClassA(&wndclass))
{

    return 0;
}

hwnd = CreateWindowA( "Test",
                     "Test",
                     WS_OVERLAPPEDWINDOW,
                     CW_USEDEFAULT,
                     CW_USEDEFAULT,
                     CW_USEDEFAULT,
                     CW_USEDEFAULT,
                     NULL,
                     NULL,
                     hInstance,
                     NULL);

ShowWindow(hwnd, iCmdShow);
UpdateWindow(hwnd);

See the results(what matters is if you get the "Access Violation" error or not, everything else is irrelevant).

Fix your code first.

Your code is broken and in its current state fails to create window, hwnd = 0. GetLastError reports 1407 - ERROR_CANNOT_FIND_WND_CLASS.

First parameter for CreateWindow should be window class string that you used in

wndclass.lpszClassName = appName.toUTF16z;

On Saturday, 21 August 2021 at 23:50:08 UTC, Ruby The Roobster wrote: > wndclass.lpszClassName = "Test"; //May need casting... don't cast it just use the w suffix wndclass.lpszClassName = "Test"w; casts are usually indicating a mistake

On Saturday, 21 August 2021 at 23:50:51 UTC, Ruby The Roobster wrote:

On Saturday, 21 August 2021 at 23:50:08 UTC, Ruby The Roobster wrote:

On Saturday, 21 August 2021 at 06:08:17 UTC, evilrat wrote:

First parameter for CreateWindow should be window class string that you used in

wndclass.lpszClassName = appName.toUTF16z;

Fix:
wndclass.lpszClassName = "Test"; //May need casting...

Anyways, this isn't an issue anymore. I'm just not gonna use Win32 API.

Of course this is the "fix", but your example works fine and opens a file when window is created.

What I don't really understand is why you are trying to remove import core.sys.windows.windows which contains declarations for HWND, HINSTANCE and family... It simply won't compile without it.

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