digitalmars.D.learn - Window procedure declaration

V (31/31) Mar 22 2005 I can't seem to assign my WNDCLASSA structures wndproc field the same

John C (4/35) Mar 23 2005 Use the address of the function instead.
Chris Sauls (7/13) Mar 23 2005 You need to use D's extern attribute. I believe this is the correct way...

John Reimer (5/22) Mar 23 2005 Actually this should be "extern(Windows)", but the idea was correct.

Chris Sauls (6/7) Mar 23 2005 I realized that about... three seconds ago. :) Alas.

V (7/19) Mar 23 2005 Thank you all for the help :D

John Reimer (4/29) Mar 23 2005 There are many win32 functions missing from std.c.windows.windows.

Stewart Gordon (6/8) Jan 06 2009 That one's old and, by the looks of it, no longer maintained. You want

Stewart Gordon (4/12) Jan 06 2009 Silly me, should've realised I was replying to an old thread. I guess

Regan Heath (12/43) Mar 23 2005 Try:

John Reimer (2/16) Mar 23 2005 Oops. Good point, Regan. I missed the CALLBACK. Don't need that there...

Regan Heath (3/14) Mar 23 2005 Is it extern (C) or extern (Windows) though? I'm not sure.

Carlos Santander B. (4/25) Mar 23 2005 Windows

V <v pathlink.com> writes:

I can't seem to assign my WNDCLASSA structures wndproc field the same 
way I did in C.

<code>
WNDCLASSA wcex;
wcex.style		= 0;
wcex.lpfnWndProc	= cast(WNDPROC) wndProc;
</code>

Compiler errors:

App.d(40): function app.wndProc (HANDLE,uint,uint,int) does not match 
argument types ()
App.d(40): Error: expected 4 arguments, not 0


Also how do I declare the procedure?  This causes errors:

<code>
LRESULT CALLBACK wndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM 
lParam)
</code>

app.d(62): semicolon expected, not 'wndProc'
app.d(62): found 'hWnd' when expecting ')'
app.d(62): semicolon expected, not 'message'
app.d(62): no identifier for declarator message
app.d(62): semicolon expected, not 'wParam'
app.d(62): no identifier for declarator wParam
app.d(62): semicolon expected, not 'lParam'
app.d(62): no identifier for declarator lParam
app.d(62): semicolon expected, not ')'
app.d(62): Declaration expected, not ')'
app.d(70): Declaration expected, not 'case'
app.d(77): Declaration expected, not 'case'
app.d(81): Declaration expected, not 'case'
app.d(91): Declaration expected, not 'default'
app.d(93): unrecognized declaration

Mar 22 2005

"John C" <johnch_atms hotmail.com> writes:

"V" <v pathlink.com> wrote in message 
news:d1r499$1jh3$1 digitaldaemon.com...
I can't seem to assign my WNDCLASSA structures wndproc field the same way I 
did in C.

 <code>
 WNDCLASSA wcex;
 wcex.style = 0;
 wcex.lpfnWndProc = cast(WNDPROC) wndProc;
 </code>

Use the address of the function instead.

    wcex.lpfnWndProc = &wndProc;

 Compiler errors:

 App.d(40): function app.wndProc (HANDLE,uint,uint,int) does not match 
 argument types ()
 App.d(40): Error: expected 4 arguments, not 0


 Also how do I declare the procedure?  This causes errors:

 <code>
 LRESULT CALLBACK wndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM 
 lParam)
 </code>

 app.d(62): semicolon expected, not 'wndProc'
 app.d(62): found 'hWnd' when expecting ')'
 app.d(62): semicolon expected, not 'message'
 app.d(62): no identifier for declarator message
 app.d(62): semicolon expected, not 'wParam'
 app.d(62): no identifier for declarator wParam
 app.d(62): semicolon expected, not 'lParam'
 app.d(62): no identifier for declarator lParam
 app.d(62): semicolon expected, not ')'
 app.d(62): Declaration expected, not ')'
 app.d(70): Declaration expected, not 'case'
 app.d(77): Declaration expected, not 'case'
 app.d(81): Declaration expected, not 'case'
 app.d(91): Declaration expected, not 'default'
 app.d(93): unrecognized declaration

Mar 23 2005

Chris Sauls <ibisbasenji gmail.com> writes:

V wrote:
 Also how do I declare the procedure?  This causes errors:
 
 <code>
 LRESULT CALLBACK wndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM 
 lParam)
 </code>

You need to use D's extern attribute.  I believe this is the correct way:





-- Chris Sauls

Mar 23 2005

John Reimer <brk_6502 yahoo.com> writes:

Chris Sauls wrote:
 V wrote:
 
 Also how do I declare the procedure?  This causes errors:

 <code>
 LRESULT CALLBACK wndProc(HWND hWnd, UINT message, WPARAM wParam, 
 LPARAM lParam)
 </code>

 
 
 You need to use D's extern attribute.  I believe this is the correct way:




 
 -- Chris Sauls

Actually this should be "extern(Windows)", but the idea was correct.

His problem seems to have arisen from an absence of both the "&" 
operator and the extern(Windows).

-JJR

Mar 23 2005

Chris Sauls <ibisbasenji gmail.com> writes:

John Reimer wrote:
 Actually this should be "extern(Windows)", but the idea was correct.

I realized that about... three seconds ago.  :)  Alas.

Also would be helpful to check out these two pages from the specs:
http://www.digitalmars.com/d/windows.html
http://www.digitalmars.com/d/dll.html

-- Chris Sauls

Mar 23 2005

V <v pathlink.com> writes:

Chris Sauls wrote:
 John Reimer wrote:
 
 Actually this should be "extern(Windows)", but the idea was correct.

 
 
 I realized that about... three seconds ago.  :)  Alas.
 
 Also would be helpful to check out these two pages from the specs:
 http://www.digitalmars.com/d/windows.html
 http://www.digitalmars.com/d/dll.html
 
 -- Chris Sauls

Thank you all for the help :D

I've noticed that some functions are missing from std.c.windows.windows like
BOOL DestroyWindow(HWND hWnd) and BOOL UnregisterClassA(LPCSTR 
lpClassName, HINSTANCE hInstance) and some of the defines like 
WS_EX_CLIENTEDGE.  Are any of these going to be added or do I have to 
define each function as an extern?

Mar 23 2005

John Reimer <brk_6502 yahoo.com> writes:

V wrote:
 Chris Sauls wrote:
 
 John Reimer wrote:

 Actually this should be "extern(Windows)", but the idea was correct.



 I realized that about... three seconds ago.  :)  Alas.

 Also would be helpful to check out these two pages from the specs:
 http://www.digitalmars.com/d/windows.html
 http://www.digitalmars.com/d/dll.html

 -- Chris Sauls

 
 
 Thank you all for the help :D
 
 I've noticed that some functions are missing from std.c.windows.windows 
 like
 BOOL DestroyWindow(HWND hWnd) and BOOL UnregisterClassA(LPCSTR 
 lpClassName, HINSTANCE hInstance) and some of the defines like 
 WS_EX_CLIENTEDGE.  Are any of these going to be added or do I have to 
 define each function as an extern?

There are many win32 functions missing from std.c.windows.windows. 
Check www.dsource.org/projects/core32 for a more complete D win32 import.

-JJR

Mar 23 2005

Stewart Gordon <smjg_1998 yahoo.com> writes:

John Reimer wrote:
<snip>
 There are many win32 functions missing from std.c.windows.windows. Check 
 www.dsource.org/projects/core32 for a more complete D win32 import.

That one's old and, by the looks of it, no longer maintained.  You want 
this one:
http://www.dsource.org/projects/bindings/wiki/WindowsApi

Stewart.

Jan 06 2009

Stewart Gordon <smjg_1998 yahoo.com> writes:

Stewart Gordon wrote:
 John Reimer wrote:
 <snip>
 There are many win32 functions missing from std.c.windows.windows. 
 Check www.dsource.org/projects/core32 for a more complete D win32 import.

 
 That one's old and, by the looks of it, no longer maintained.  You want 
 this one:
 http://www.dsource.org/projects/bindings/wiki/WindowsApi

Silly me, should've realised I was replying to an old thread.  I guess 
it's one of the natural consequences of switching newsreaders.

Stewart.

Jan 06 2009

"Regan Heath" <regan netwin.co.nz> writes:

On Tue, 22 Mar 2005 22:51:06 -0800, V <v pathlink.com> wrote:
 I can't seem to assign my WNDCLASSA structures wndproc field the same  
 way I did in C.

 <code>
 WNDCLASSA wcex;
 wcex.style		= 0;
 wcex.lpfnWndProc	= cast(WNDPROC) wndProc;
 </code>

 Compiler errors:

 App.d(40): function app.wndProc (HANDLE,uint,uint,int) does not match  
 argument types ()
 App.d(40): Error: expected 4 arguments, not 0

Try:

wcex.lpfnWndProc	= cast(WNDPROC)&wndProc;

 Also how do I declare the procedure?  This causes errors:

 <code>
 LRESULT CALLBACK wndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM  
 lParam)
 </code>

 app.d(62): semicolon expected, not 'wndProc'
 app.d(62): found 'hWnd' when expecting ')'
 app.d(62): semicolon expected, not 'message'
 app.d(62): no identifier for declarator message
 app.d(62): semicolon expected, not 'wParam'
 app.d(62): no identifier for declarator wParam
 app.d(62): semicolon expected, not 'lParam'
 app.d(62): no identifier for declarator lParam
 app.d(62): semicolon expected, not ')'
 app.d(62): Declaration expected, not ')'
 app.d(70): Declaration expected, not 'case'
 app.d(77): Declaration expected, not 'case'
 app.d(81): Declaration expected, not 'case'
 app.d(91): Declaration expected, not 'default'
 app.d(93): unrecognized declaration

Remove "CALLBACK". Add extern(C) eg.

extern (C) LRESULT wndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM  
lParam)
{
}

CALLBACK is typically a define for __stdcall which is replaced in D with  
extern (C), see:

http://www.digitalmars.com/d/interface.html

Regan

Mar 23 2005

John Reimer <brk_6502 yahoo.com> writes:

Regan Heath wrote:

 
 Remove "CALLBACK". Add extern(C) eg.
 
 extern (C) LRESULT wndProc(HWND hWnd, UINT message, WPARAM wParam, 
 LPARAM  lParam)
 {
 }
 
 CALLBACK is typically a define for __stdcall which is replaced in D 
 with  extern (C), see:
 
 http://www.digitalmars.com/d/interface.html
 
 Regan

Oops.  Good point, Regan.  I missed the CALLBACK.  Don't need that there!

Mar 23 2005

"Regan Heath" <regan netwin.co.nz> writes:

On Wed, 23 Mar 2005 15:08:00 -0800, John Reimer <brk_6502 yahoo.com> wrote:
 Regan Heath wrote:

  Remove "CALLBACK". Add extern(C) eg.
  extern (C) LRESULT wndProc(HWND hWnd, UINT message, WPARAM wParam,  
 LPARAM  lParam)
 {
 }
  CALLBACK is typically a define for __stdcall which is replaced in D  
 with  extern (C), see:
  http://www.digitalmars.com/d/interface.html
  Regan

 Oops.  Good point, Regan.  I missed the CALLBACK.  Don't need that there!

Is it extern (C) or extern (Windows) though? I'm not sure.

Regan

Mar 23 2005

"Carlos Santander B." <csantander619 gmail.com> writes:

Regan Heath wrote:
 On Wed, 23 Mar 2005 15:08:00 -0800, John Reimer <brk_6502 yahoo.com> wrote:
 
 Regan Heath wrote:

  Remove "CALLBACK". Add extern(C) eg.
  extern (C) LRESULT wndProc(HWND hWnd, UINT message, WPARAM wParam,  
 LPARAM  lParam)
 {
 }
  CALLBACK is typically a define for __stdcall which is replaced in D  
 with  extern (C), see:
  http://www.digitalmars.com/d/interface.html
  Regan


 Oops.  Good point, Regan.  I missed the CALLBACK.  Don't need that there!

 
 
 Is it extern (C) or extern (Windows) though? I'm not sure.
 
 Regan

Windows


_______________________
Carlos Santander Bernal

Mar 23 2005

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digitalmars.D.learn - Window procedure declaration