Names of components are generally unchanged. Unions in structures are converted to union/maps within the derived type. The structures in WINDOWS.H have been converted to derived types in IFWINTY. You can also use the CHAR intrinsic: character(LEN=32) forstring
Api mytime code#
This code shows the extension of using the null-terminator for the string in the Fortran DATA statement (see C Strings in Character Constants): DATA forstring /'This is a null-terminated string.'C/
Api mytime 64 bits#
Pointer arguments on systems using Intel® 64 architecture are 64 bits (8 bytes) in length.īe aware that Fortran character variables need to be null-terminated. Pointer arguments on systems using IA-32 architecture are 32-bit (4 bytes) in length. Older interface definitions use the POINTER - Integer and pass the address of the argument. If an argument is described in the Platform SDK documentation as a pointer, then the corresponding Fortran interface definition of that argument would have the REFERENCE property (see the ATTRIBUTES). Other notes about equivalent data types for arguments: FALSE., and do not test BOOL values using LOGICAL expressions. Use the constants TRUE and FALSE, defined in IFWINTY, rather than the Fortran literals.
Api mytime windows#
Note that the Windows BOOL type is not equivalent to Fortran LOGICAL and should not be used with Fortran LOGICAL operators and literal constants. Use the kind constants instead of explicitly specifying the kind as a number, or assuming a default kind. You might create a new Fortran Console (or QuickWin) application project, add the code shown above as a source file, build it, and view the result. WRITE (*,*) 'Current UTC time hour and minute:', Mytime.wHour, Mytime.Wminute
! interface definitions from kernel32.mod instead of all modules ! Since the only routine called is GetSystemTime, only include
Api mytime how to#
For example, the completed program follows: ! Getsystime.f90 file shows how to call a Windows API routine Use the variable definition to call the Win32 routine. In some cases, these will differ slightly from those listed in the Platform SDK documentation.ĭefine a variable name to use the derived-type definition in your program, such as: TYPE (T_SYSTEMTIME) MYTIME View the data type definition and note the field names. Search (or Find) the data type name (such as T_SYSTEMTIME). In a text editor (such as Notepad), open the file IFWINTY.F90 from. For example, to view the data type definition for the T_SYSTEMTIME type used in GetSystemTime: If one of the arguments is a structure, you should look up the definition in IFWINTY.F90 in. Take note of how arguments are passed in some cases, such as when an arbitrary data type is passed by address, you must pass the address of a variable using the LOC intrinsic rather than the variable directly. View the interface definition and compare it to the description in the Platform SDK documentation to see how the arguments are represented in Fortran. Search (or Find) the routine name (such as GetSystemTime) In a text editor (such as Notepad), open the file kernel32.f90 from. For example, to view the interface definition for GetSystemTime: If you are not sure about the data type of arguments or its function return value, you can examine the interface definitions in the appropriate. For example, the GetSystemTime routine calling format starts with VOID, so this routine should be called as a subroutine with a CALL statement.
Whether the routine returns a result (a function) or not (subroutine).
If character arguments are present, add a null character as a terminator to the character variable before calling the Windows API routine. In the case of the GetSystemTime routine, a structure (derived type) is passed by reference. You will need to declare and initialize each argument variable using the correct data type. To call the appropriate Windows API routine after including the Intel Visual Fortran interface definitions, follow these guidelines:Įxamine the documentation for the appropriate routine in the Platform SDK (for example GetSystemTime) to obtain the following information: Calling Windows API Routines Using the Intel Visual Fortran Interface Definitions
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