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| Author |
type cast warnings
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| Hi,
how should i typecast a HICON to LONG without a warning ?
[VS2005]
.....
HICON icon = LoadIcon(_Module.GetResourceInstance(),
MAKEINTRESOURCE(IDI_ICON1));
if( icon )
::SetClassLong(m_hWnd, GCL_HICON, (LONG)icon);
.....
warning C4311: 'type cast' : pointer truncation from 'HICON' to 'LONG'
Thanks.
| |
| Victor Bazarov 2006-01-28, 7:07 pm |
| ama wrote:
> how should i typecast a HICON to LONG without a warning ?
>
> [VS2005]
> ....
>
> HICON icon = LoadIcon(_Module.GetResourceInstance(),
> MAKEINTRESOURCE(IDI_ICON1));
> if( icon )
> ::SetClassLong(m_hWnd, GCL_HICON, (LONG)icon);
> ....
> warning C4311: 'type cast' : pointer truncation from 'HICON' to 'LONG'
You can't avoid this. Apparently, 'HICON' and 'LONG' types in your
system have different sizes. It is quite possible that 'HICON' is
64 bits. 'LONG' is 32 bits (don't ask why). Any attempt to convert
a 64 bit value into a 32 bit value causes truncation.
V
| |
| James Park 2006-01-28, 7:07 pm |
| "ama" <a.m.a@videotron.ca> wrote in message
news:yrSCf.40789$lM1.502824@weber.videotron.net...
> Hi,
>
> how should i typecast a HICON to LONG without a warning ?
>
> [VS2005]
> ....
>
> HICON icon = LoadIcon(_Module.GetResourceInstance(),
> MAKEINTRESOURCE(IDI_ICON1));
> if( icon )
> ::SetClassLong(m_hWnd, GCL_HICON, (LONG)icon);
> ....
> warning C4311: 'type cast' : pointer truncation from 'HICON' to 'LONG'
>
> Thanks.
http://msdn.microsoft.com/library/e...ng_pointers.asp
| |
|
|
> You can't avoid this. Apparently, 'HICON' and 'LONG' types in your
> system have different sizes. It is quite possible that 'HICON' is
> 64 bits. 'LONG' is 32 bits (don't ask why). Any attempt to convert
> a 64 bit value into a 32 bit value causes truncation.
>
> V
thanks, ill keep this in mind
| |
| Abdo Haji-Ali 2006-01-29, 3:57 am |
| Use SetClassLongPtr() instead which is "compatible with both 32-bit and
64-bit Microsoft® Windows®"
--
Abdo Haji-Ali
Programmer
In|Framez
"ama" <a.m.a@videotron.ca> wrote in message
news:yrSCf.40789$lM1.502824@weber.videotron.net...
> Hi,
>
> how should i typecast a HICON to LONG without a warning ?
>
> [VS2005]
> ....
>
> HICON icon = LoadIcon(_Module.GetResourceInstance(),
> MAKEINTRESOURCE(IDI_ICON1));
> if( icon )
> ::SetClassLong(m_hWnd, GCL_HICON, (LONG)icon);
> ....
> warning C4311: 'type cast' : pointer truncation from 'HICON' to 'LONG'
>
> Thanks.
>
>
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