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67 lines
2.1 KiB
Markdown
67 lines
2.1 KiB
Markdown
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The [CHDIR](CHDIR) statement changes the program's location from one working directory to another by specifying a literal or variable [STRING](STRING) path.
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## Syntax
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> [CHDIR](CHDIR) path$
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## Description
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* path$ is the new directory path the program will work in.
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* path$ can be an absolute path (starting from the root folder) or relative path (starting from the current program location).
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* If path$ specifies a non-existing path, a [ERROR Codes](ERROR-Codes) error will occur.
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* **A QB64 [SHELL](SHELL) statement cannot use "CD " or "CHDIR " + path$ to change directories.**
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## Example(s)
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The following code is Windows-specific:
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```vb
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CHDIR "C:\" 'change to the root drive C (absolute path)
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CHDIR "DOCUME~1" 'change to "C:\Documents and Settings" from root drive (relative path)
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CHDIR "..\" 'change back to previous folder one up
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```
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> *Details:* **QB64** can use long or short (8.3 notation) file and path names.
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Using the Windows API to find the current program's name and root path. The PATH$ is a shared function value.
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```vb
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_TITLE "My program"
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PRINT TITLE$
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PRINT PATH$
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FUNCTION TITLE$ *=== SHOW CURRENT PROGRAM
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SHARED PATH$ 'optional path information shared with main module only
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DECLARE LIBRARY 'Directory Information using KERNEL32 provided by Dav
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FUNCTION GetModuleFileNameA (BYVAL Module AS LONG, FileName AS STRING, BYVAL nSize AS LONG)
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END DECLARE
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FileName$ = SPACE$(256)
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Result = GetModuleFileNameA(0, FileName$, LEN(FileName$)) '0 designates the current program
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IF Result THEN 'Result returns the length or bytes of the string information
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PATH$ = LEFT$(FileName$, Result)
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start = 1
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DO
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posit = INSTR(start, PATH$, "\")
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IF posit THEN last = posit
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start = posit + 1
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LOOP UNTIL posit = 0
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TITLE$ = MID$(PATH$, last + 1)
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PATH$ = LEFT$(PATH$, last)
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ELSE TITLE$ = "": PATH$ = ""
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END IF
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END FUNCTION
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```
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> **Note:** The program's [_TITLE](_TITLE) name may be different from the actual program module's file name returned by Windows.
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## See Also
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* [SHELL](SHELL), [FILES](FILES)
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* [MKDIR](MKDIR), [RMDIR](RMDIR)
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* [$CONSOLE]($CONSOLE)
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