Where to find the reference of dos.h for the c programming language?

I'm looking for the reference/documentation of the dos.h API. (especially for an openwatcom specific version).

Where to get the documentation?

Solution

One reasonable starting point would probably be the library documentation at OpenWatcom.

How to perform addition of two vectors of 8-bit integers with a single addition in C/C++
GNU RISC-V Embedded GCC throws "x ISA extension `xw' must be set with the versions" error
How to implement variable sized array within C struct
Counting pulses using a swiss flow meter with an Arduino, how is it done?
How to create a folder in C (need to run on both Linux and Windows)
Is there any way to compute the width of an integer type at compile-time?
What kind of implementation can I use for a static associative array on a vintage system with very limited resources?
How can I initialize all members of an array to the same value?
Is C notably faster than C++
How to get the Windows SDK version number a program is compiling with at compile time
Confused by difference between expression inside if and expression outside if
Equivalent of atoi for unsigned integers
k&r: Exercise 1-18. Program takes input but doesnt produce any output?
Using in C thrd_sleep() to either wait for time or interrupt by signal. Example?
How to get the sign, mantissa and exponent of a floating point number
How can I compute `exp(x)/2` when `x` is large?
c programming: answer always equates to 0
Is it possible to access a parameter of a function from another function in C?
Will this expression evaluate to true or false (1 or 0) in C?
What Is the Return Value of strcspn() When Str1 Does not Contain Str2?
Mapping a numeric range onto another
Signalled and non-signalled state of event
Why is faster to do a branch than a lookup?
Avoid security.ArrayBound warning when using container_of
Forcing 64-bit long doubles?
"error: redeclaration of 'myVariable' with no linkage:" - what's the linkage?
Branchlessly map one list of integers to another
SQLBindCol for long integer value on 64Bit platform?
What's wrong with my code? CS50 Pset2: Readability
Is there a way to redirect stdout/stderr to a string?