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January 01, 2009 [WINAPI] Window in D | ||||
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My english is not good. Apologize for this. I start programming in D and i have a problem. When I try make a window procedure and register class window. Compiler show error: "Error: cannot implicitly convert expression (& WindowProcedure) of type intWindows function(HANDLE, uint, uint, int) function(HANDLE hwnd, uint message, uint wParam, int lParam) to intWindows function(HANDLE, uint, uint, int)" Window Procedure: "WNDPROC WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) { switch (message) { case WM_DESTROY: PostQuitMessage (0); break; default: return cast(WNDPROC) DefWindowProcA (hwnd, message, wParam, lParam); } return cast(WNDPROC) 0; }" How must look window procedure in order to it's work? |
January 02, 2009 Re: [WINAPI] Window in D | ||||
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Posted in reply to Daniel Wojdak | Daniel Wojdak wrote:
> My english is not good. Apologize for this.
>
> I start programming in D and i have a problem.
> When I try make a window procedure and register class window. Compiler show error: "Error: cannot implicitly convert expression (& WindowProcedure) of type intWindows function(HANDLE, uint, uint, int) function(HANDLE hwnd, uint message, uint wParam, int lParam) to intWindows function(HANDLE, uint, uint, int)"
>
> Window Procedure:
>
> "WNDPROC WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
> {
> switch (message)
> {
>
> case WM_DESTROY:
> PostQuitMessage (0);
> break;
> default:
> return cast(WNDPROC) DefWindowProcA (hwnd, message, wParam, lParam);
> }
>
> return cast(WNDPROC) 0;
> }"
>
> How must look window procedure in order to it's work?
>
This should do the trick:
extern(Windows) int WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
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January 02, 2009 Re: [WINAPI] Window in D | ||||
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Posted in reply to Daniel Wojdak | On Thu, 01 Jan 2009 19:34:42 +0300, Daniel Wojdak <danielwojdak@gmail.com> wrote:
> My english is not good. Apologize for this.
>
> I start programming in D and i have a problem.
> When I try make a window procedure and register class window. Compiler show error:
> "Error: cannot implicitly convert expression (& WindowProcedure) of type intWindows function(HANDLE, uint, uint, int) function(HANDLE hwnd, uint message, uint wParam, int lParam) to intWindows function(HANDLE, uint, uint, int)"
>
> Window Procedure:
>
> "WNDPROC WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
> {
> switch (message)
> {
>
> case WM_DESTROY:
> PostQuitMessage (0);
> break;
> default:
> return cast(WNDPROC) DefWindowProcA (hwnd, message, wParam, lParam);
> }
>
> return cast(WNDPROC) 0;
> }"
>
> How must look window procedure in order to it's work?
>
Ouch! What does this function return? Shouldn't typeof(return) be LRESULT?
extern(Windows):
LRESULT WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WM_DESTROY:
PostQuitMessage (0);
break;
default:
break;
}
return DefWindowProcA (hwnd, message, wParam, lParam);
}
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December 28, 2012 Re: [WINAPI] Window in D | ||||
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Posted in reply to Denis Koroskin | > Ouch! What does this function return? Shouldn't typeof(return) be LRESULT? > > extern(Windows): What he says is good, but I believe you should add nothrow to that: extern( Windows ) nothrow: > LRESULT WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) > { > switch (message) > { > case WM_DESTROY: > PostQuitMessage (0); > break; > default: > break; > } > > return DefWindowProcA (hwnd, message, wParam, lParam); > } |
December 28, 2012 Re: [WINAPI] Window in D | ||||
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Posted in reply to Phil Lavoie | On Friday, 28 December 2012 at 16:25:30 UTC, Phil Lavoie wrote:
>> Ouch! What does this function return? Shouldn't typeof(return) be LRESULT?
>>
>> extern(Windows):
> What he says is good, but I believe you should add nothrow to that:
> extern( Windows ) nothrow:
>> LRESULT WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
>> {
>> switch (message)
>> {
>> case WM_DESTROY:
>> PostQuitMessage (0);
>> break;
>> default:
>> break;
>> }
>>
>> return DefWindowProcA (hwnd, message, wParam, lParam);
>> }
haha! Never mind that I did not realized the thread was started that long ago!
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