Re: SendMessageTimeoutW requires casting string to uint?
Update: 2022-03-04 ChangeLog: * Fixed Typos * Added Switch Statement for Command Line Interface Arguments * Added Switch Statement for Policy, intl, Environment * Added Switch Statement for Error handling: Exit status, Error level * Increased window "timeout" from 1 to 1000 https://github.com/vaido-world/WM_SETTINGCHANGE
Re: SendMessageTimeoutW requires casting string to uint?
On Tuesday, 9 July 2019 at 13:10:57 UTC, a11e99z wrote:
On Tuesday, 9 July 2019 at 12:14:38 UTC, BoQsc wrote:
On Tuesday, 9 July 2019 at 11:11:53 UTC, Dejan Lekic wrote:
auto result = SendMessageTimeoutW(
HWND_BROADCAST,
WM_SETTINGCHANGE,
0,
envi.toUTF16z,
SMTO_ABORTIFHUNG,
timeout,
null
);
C:\Users\User\Desktop>rdmd ref.d
ref.d(19): Error: function
`core.sys.windows.winuser.SendMessageTimeoutW(void*, uint,
uint, int, uint, uint, uint*)` is not callable using argument
types `(void*, int, int, const(wchar)*, int, uint,
typeof(null))`
ref.d(19):cannot pass argument
`toUTF16z(cast(const(char)[])envi)` of type `const(wchar)*`
to parameter `int`
Failed: ["C:\\D\\dmd2\\windows\\bin\\dmd.exe", "-v", "-o-",
"ref.d", "-I."]
// add cast to LPARAM for SendMessageTimeoutW
cast( LPARAM )envi.toUTF16z,
// import lib too somewhere out of main() or in command line
version(Windows) pragma(lib, "user32.lib");
You are absolutely right.
Here is a working example code on how to broadcast environment
variables changes
from D language to Windows XP, 7, 8, 10 systems, if anyone
searches for it.
To launch the code:
rdmd broadcastSignal.d
broadcastSignal.d
import std.utf;
version(Windows) pragma(lib, "user32.lib");
import core.sys.windows.windows : SendMessageTimeoutW;
import core.sys.windows.windows : GetLastError;
import core.sys.windows.windows : ERROR_SUCCESS;
import core.sys.windows.windows : SMTO_ABORTIFHUNG;
import core.sys.windows.windows : LPARAM;
import core.sys.windows.windows : HWND_BROADCAST;
import core.sys.windows.windows : WM_SETTINGCHANGE;
void main(){
broadcastSettingChange();
}
/**
Broadcasts a signal to update All Environment variables On
Windows XP, 7, 8, 10 systems.
Mostly used update changes to Path environment variable.
After broadcast of this signal, reopen applications, for
changes to be visible.
Date: 07/09/2019
License: use freely for any purpose
Params:
addressBroadcast = "Policy" When the system sends
this message as a result of a change in policy settings, this
parameter points to this string.
"intl"When the system sends
this message as a result of a change in locale settings, this
parameter points to this string.
"Environment" To effect a change in
the environment variables for the system or the user, broadcast
this message with lParam set to this string
Returns: does not return
See_Also:
https://docs.microsoft.com/lt-lt/windows/win32/api/winuser/nf-winuser-sendmessagetimeouta
https://docs.microsoft.com/en-us/windows/win32/winmsg/wm-settingchange
*/
void broadcastSettingChange (string
addressBroadcast="Environment", uint timeout=1)
{
void* hWnd = HWND_BROADCAST;
uint Msg = WM_SETTINGCHANGE;
uint wParam = 0;
int lParam = cast( LPARAM )addressBroadcast.toUTF16z;
uint fuFlags = SMTO_ABORTIFHUNG;
uint uTimeout = timeout;
uint* lpdwResult = null;
int result = SendMessageTimeoutW(
hWnd,
Msg,
wParam,
lParam,
SMTO_ABORTIFHUNG,
uTimeout,
lpdwResult
);
if(result == 0)
{
auto errCode = GetLastError();
}
}
Re: SendMessageTimeoutW requires casting string to uint?
On Tuesday, 9 July 2019 at 12:14:38 UTC, BoQsc wrote: On Tuesday, 9 July 2019 at 11:11:53 UTC, Dejan Lekic wrote: auto result = SendMessageTimeoutW( HWND_BROADCAST, WM_SETTINGCHANGE, 0, envi.toUTF16z, SMTO_ABORTIFHUNG, timeout, null ); C:\Users\User\Desktop>rdmd ref.d ref.d(19): Error: function `core.sys.windows.winuser.SendMessageTimeoutW(void*, uint, uint, int, uint, uint, uint*)` is not callable using argument types `(void*, int, int, const(wchar)*, int, uint, typeof(null))` ref.d(19):cannot pass argument `toUTF16z(cast(const(char)[])envi)` of type `const(wchar)*` to parameter `int` Failed: ["C:\\D\\dmd2\\windows\\bin\\dmd.exe", "-v", "-o-", "ref.d", "-I."] // add cast to LPARAM for SendMessageTimeoutW cast( LPARAM )envi.toUTF16z, // import lib too somewhere out of main() or in command line version(Windows) pragma(lib, "user32.lib");
Re: SendMessageTimeoutW requires casting string to uint?
On Tuesday, 9 July 2019 at 11:11:53 UTC, Dejan Lekic wrote:
Now that I browsed the std.utf more, I realised what fits your
need best is the https://dlang.org/phobos/std_utf.html#toUTF16z
So far, this is what I have:
Filename: myVersion.d
import core.sys.windows.windows : SendMessageTimeoutW;
import core.sys.windows.windows : GetLastError;
import core.sys.windows.windows : ERROR_SUCCESS;
import core.sys.windows.windows : SMTO_ABORTIFHUNG;
import core.sys.windows.windows : LPARAM;
import core.sys.windows.windows : HWND_BROADCAST;
import core.sys.windows.windows : WM_SETTINGCHANGE;
import std.utf;
void main(){
broadcastSettingChange();
}
void broadcastSettingChange (string envi="Environment", uint
timeout=1)
{
auto result = SendMessageTimeoutW(
HWND_BROADCAST,
WM_SETTINGCHANGE,
0,
envi.toUTF16z,
SMTO_ABORTIFHUNG,
timeout,
null
);
if(result == 0)
{
auto errCode = GetLastError();
}
}
The dmd output:
C:\Users\User\Desktop>rdmd ref.d
ref.d(19): Error: function
`core.sys.windows.winuser.SendMessageTimeoutW(void*, uint,
uint, int, uint, uint, uint*)` is not callable using argument
types `(void*, int, int, const(wchar)*, int, uint,
typeof(null))`
ref.d(19):cannot pass argument
`toUTF16z(cast(const(char)[])envi)` of type `const(wchar)*` to
parameter `int`
Failed: ["C:\\D\\dmd2\\windows\\bin\\dmd.exe", "-v", "-o-",
"ref.d", "-I."]
Re: SendMessageTimeoutW requires casting string to uint?
On Tuesday, 9 July 2019 at 10:34:54 UTC, BoQsc wrote: All I know that there was toString16z function from tango project, that made it all work. Now that I browsed the std.utf more, I realised what fits your need best is the https://dlang.org/phobos/std_utf.html#toUTF16z
Re: SendMessageTimeoutW requires casting string to uint?
On Tuesday, 9 July 2019 at 10:34:54 UTC, BoQsc wrote: I'm quite new to the programming, and I'm getting unsure how to make SendMessageTimeoutW to work with D lang. Most of my attention right now resides around the Argument of the SendMessageTimeoutW function: "Environment", It seems that SendMessageTimeoutW accepts only uint type, and string can't be directly used. I think that I have to convert string characters to "C-style 0 terminated string". And everything should work? But I'm unsure how to do that. All I know that there was toString16z function from tango project, that made it all work. std.utf module has all encoding/decoding you need (in this case UTF-16). I guess You need to convert your string using toUTF16 ( https://dlang.org/phobos/std_utf.html#toUTF16 ). I do not do Windows programming so I am not 100% sure whether this will work or not. Give it a try.
Re: SendMessageTimeoutW requires casting string to uint?
On Tuesday, 9 July 2019 at 11:06:54 UTC, Dejan Lekic wrote: std.utf module has all encoding/decoding you need (in this case UTF-16). I guess You need to convert your string using toUTF16 ( https://dlang.org/phobos/std_utf.html#toUTF16 ). I do not do Windows programming so I am not 100% sure whether this will work or not. Give it a try. Maybe even the straightforward to!wchar will work!?
SendMessageTimeoutW requires casting string to uint?
I'm quite new to the programming, and I'm getting unsure how to
make SendMessageTimeoutW to work with D lang.
Most of my attention right now resides around the Argument of the
SendMessageTimeoutW function:
"Environment",
It seems that SendMessageTimeoutW accepts only uint type, and
string can't be directly used.
I think that I have to convert string characters to "C-style 0
terminated string".
And everything should work? But I'm unsure how to do that.
All I know that there was toString16z function from tango
project, that made it all work.
http://www.dsource.org/projects/tango/docs/stable/tango.stdc.stringz.html#toString32z
cast(LPARAM)(settingName.toString16z())
Here is how the method was before my modifications:
void broadcastSettingChange (string settingName, uint timeout=1)
{
auto result = SendMessageTimeoutW(
HWND_BROADCAST,
WM_SETTINGCHANGE,
0,
cast(LPARAM)(settingName.toString16z(),
SMTO_ABORTIFHUNG,
timeout,
null
);
And finally, here is myVersion.d that throws an error (that I use
incorrect variable type for the argument)
myVersion.d
import core.sys.windows.windows : SendMessageTimeoutW;
import core.sys.windows.windows : GetLastError;
import core.sys.windows.windows : ERROR_SUCCESS;
import core.sys.windows.windows : SMTO_ABORTIFHUNG;
import core.sys.windows.windows : LPARAM;
import core.sys.windows.windows : HWND_BROADCAST;
import core.sys.windows.windows : WM_SETTINGCHANGE;
void main(){
broadcastSettingChange();
}
void broadcastSettingChange (uint timeout=1)
{
auto result = SendMessageTimeoutW(
HWND_BROADCAST,
WM_SETTINGCHANGE,
0,
"Environment",
SMTO_ABORTIFHUNG,
timeout,
null
);
if(result == 0)
{
auto errCode = GetLastError();
}
}
