在Windows Service中使用C ++获取默认打印机更改通知 [英] Getting default printer change notification using c++ in Windows service

问题描述

我需要点击默认打印机更改通知，这可能吗？

I need to tap default printer change notification, is it possible?

我的情况是，每当在窗口中更改默认打印机时，我都想执行命令。我的命令所做的是，它仅从注册表获取默认打印机信息，并将其保存在HKLM中。

My scenario is that I want to execute a command whenever default printer is changed in window. What my command does is, it just takes default printer information from registry and save it in HKLM.

因此，我为此提供了服务。使用此服务，每当更改默认打印机时，如何点击通知。我正在使用C ++。

So, I have a service for this. Using this service, how can i tap notifications whenever a default printer is changed. I am using C++.

推荐答案

拦截消息WM_WININICHANGE，然后获得新的打印机：

Intercept message WM_WININICHANGE, then get the new printer:

PRINTDLGW *pd;
pd = (PRINTDLGW *)malloc(sizeof(PRINTDLGW));
pd->lStructSize = sizeof(PRINTDLGW);
pd->hDevMode = NULL;
pd->hDevNames = NULL;
pd->Flags = PD_RETURNDEFAULT;
PrintDlgW(pd);

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