At first, the Windows explorer.exe was closed and the desktop screen went black. My program needs to start explorer.exe. This is I tried:
QProcess process;
process.execute("explorer.exe");
The problem is this only pops up a new explorer window instead of reactivating the desktop explorer (turn the black screen back to desktop). It should behave just like when you run explorer.exe after you kill it in cmd or powershell.
Solution found:
QProcess::startDetached("explorer.exe"); //Wrong
QProcess::execute("C:\\Windows\\explorer.exe"); //Wrong
QProcess::startDetached("C:\\Windows\\explorer.exe"); //Right
If anyone knows why explorer.exe behaviour like this, please share it.