Re: Whats the correct way to pass a D array type to a win32 api function wanting a buffer?

[John Chapman via Digitalmars-d-learn]

On Thursday, 13 July 2017 at 01:15:46 UTC, FoxyBrown wrote:
        ENUM_SERVICE_STATUS_PROCESS[5000] services;
	auto res = SVC.EnumServicesStatusExA(schSCManager, 
SC_ENUM_TYPE.SC_ENUM_PROCESS_INFO, servicesType, 
SERVICE_STATE_ALL, cast(ubyte*)services.ptr, 
5000*ENUM_SERVICE_STATUS_PROCESS.sizeof, &dwBytesNeeded, 
&dwCount, &resume, cast(const(char)*)null);

You need to call EnumServicesStatusEx twice - the first time to 
get the required size of the buffer. See the docs for the 
lpServices parameter here 
https://msdn.microsoft.com/en-us/library/windows/desktop/ms682640(v=vs.85).aspx

Then allocate a buffer using the returned dwBytesNeeded and call 
the function again with your buffer and its size.