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pd f2imgl ib R eferenc e  Ap pendi x       A. 13
pdf2img_init 
(const char *fontDirList[], unsigned int listLen)
Return Value: int
Description
This calling argument initializes PDF2IMG before use. If used in a 
multi-threaded application, each calling thread must do its own 
initialization before use.
Parameters
• const char *fontDirList[]: a list of null-terminated 
C strings containing directories in which PDF2IMG  should 
search for fonts and font resources to use when rasterizing 
documents which have non-embedded fonts
• unsigned int listLen: number of strings in this list
Return Value
int
Exceptions
Header
pdf2imglib.h
Related Methods
pdf2img_init_ex,
pdf2img_term
Availability
All platforms
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Allow C# developers to use mature APIs to delete and remove text content from PDF document
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A.14
PDF2IMG User Guide
pdf2img_init_ex 
(PDF2IMGInitParams *pInitParams)
Return Value: int
Description
This calling argument initializes PDF2IMG before use, in the 
same manner as pdf2img_init. If used in a multi-threaded 
application, each calling thread must do its own initialization 
before use.
This argument is an alternative to the standard 
pdf2img_init call, which scans default system font resource 
locations as well as its current directory at startup time. That 
font scanning time can be quite significant in some cases, and 
this call offers the option of fine-tuning performance by sup-
pressing the default scans, and by providing a specific list of 
locations to be scanned instead.
When the ignoreSysFonts  and ignoreCurrentDirec-
tory elements of its PDF2IMGInitParams argument struc-
ture are set to true (their default is false), this call will search 
only the indicated font resource locations passed within the 
fontDirList element, and no other locations.
Parameters
PDF2IMGInitParams *pInitParams: structure for passing 
a list of font resource locations to be searched at startup, along 
with flag settings to prevent searching the current directory or 
the system fonts areas.
Return Value
int
Exceptions
Header
pdf2imglib.h
Related Methods
pdf2img_init,
pdf2img_term
Availability
All platforms
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C# File: Merge PDF; C# File: Split PDF; C# Page: Insert PDF pages; C# Page: Delete PDF pages; C# Read: PDF Text Extract; C# Read: PDF
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pd f2imgl ib R eferenc e  Ap pendi x       A. 15
pdf2img_last_error 
(ImageConversion iC)
Return Value: int
Description
This call returns the last error number.
Parameters
ImageConversion iC: the data structure containing the 
specifications for the active, current conversion
Return Value
int
Exceptions
Header
pdf2imglib.h
Related Methods
pdf2img_get_extended_error
Availability
All platforms
C# PDF Page Delete Library: remove PDF pages in C#.net, ASP.NET
Demo Code: How to Delete a Single PDF Page from PDF File in C#.NET. Description: Delete specified page from the input PDF file. Parameters:
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A.16
PDF2IMG User Guide
pdf2img_new_conversion
(const char *inPDFPath)
Return Value: ImageConversion
Technical Notes
1 This call maintains an open file handle for the inPDFPath argument.
2 Of the two calls pdf2img_new_conversion and pdf2img_new_memconversion, one or the 
other must be called to create an image conversion, but not both.
Description
This call creates a PDF-to-Image conversion. Each is local to the 
thread which makes this function call, and should not be shared 
across threads.
Parameters
const char *inPDFPath: path to location of input image 
file
Return Value
ImageConversion
Exceptions
Header
pdf2imglib.h
Related Methods
pdf2img_destroy_conversion,
pdf2img_new_conversion_with_password,
pdf2img_new_memconversion,
pdf2img_new_memconversion_with_password
Availability
All platforms
VB.NET PDF Text Extract Library: extract text content from PDF
Extract and get partial and all text content from PDF file. Extract highlighted text out of PDF document. Extract Text Content from PDF File in VB.NET.
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pd f2imgl ib R eferenc e  Ap pendi x       A. 17
pdf2img_new_conversion_with_password
(const char *inPDFPath, const char *password)
Return Value: ImageConversion
Technical Notes
1 This call maintains an open file handle for the inPDFPath argument.
2 A document with a User password but no other security restrictions can be processed by providing the 
User password here. If the document has any security restrictions on it beyond simply a User password 
to restrict viewing, you will need to specify its Owner password instead. Opening with an Owner 
password will override the document’s security restrictions, and allow PDF2IMG conversion to 
proceed.
3 It is safe to call pdf2img_new_conversion_with_password with either a NULL pointer or a 
pointer to zero length string in the password field. In such cases, this call will behave exactly the same 
as its non-password counterpart, pdf2img_new_conversion.
4 Of the two calls pdf2img_new_conversion_with_password and 
pdf2img_new_memconversion_with_password, one or the other must be called to create an 
image conversion, but not both.
Description
This call creates a PDF-to-Image conversion using the supplied 
password. Each is local to the thread which makes this function 
call, and should not be shared across threads.
Parameters
• const char *inPDFPath: path to location of input 
image file
• const char *password: password string for opening the 
PDF document
Return Value
ImageConversion
Exceptions
Header
pdf2imglib.h
Related Methods
pdf2img_destroy_conversion,
pdf2img_new_conversion,
pdf2img_new_memconversion,
pdf2img_new_memconversion_with_password
Availability
All platforms
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A.18
PDF2IMG User Guide
5 The password argument is copied to an internal buffer. The client’s copy may be released after this 
call.
6 The password must grant the following permissions on the PDF document:
If using:
Permission Required
Any output format
Open, Copy
EPS output format
High Quality printing
Color management
Modify
pd f2imgl ib R eferenc e  Ap pendi x       A. 19
pdf2img_new_memconversion 
(const void *inPDFMem, unsigned int numBytes)
Return Value: ImageConversion
Technical Notes
1 The memory in inPDFMem must be available until pdf2img_destroy_conversion is called for 
this conversion; it is not copied by PDF2IMG.
2 Of the two calls pdf2img_new_conversion and pdf2img_new_memconversion, one or the 
other must be called to create an image conversion, but not both.
Description
This call creates a PDF-to-Image conversion from a buffer of 
bytes. Each is local to the thread which makes this function call, 
and should not be shared across threads.
Parameters
• const void *inPDFMem: pointer to location of input 
image in memory
• unsigned int numBytes: number of bytes in this buffer
Return Value
ImageConversion
Exceptions
Header
pdf2imglib.h
Related Methods
pdf2img_destroy_conversion,
pdf2img_new_conversion,
pdf2img_new_conversion_with_password,
pdf2img_new_memconversion_with_password
Availability
All platforms
A.20
PDF2IMG User Guide
pdf2img_new_memconversion_with_password 
(const void *inPDFMem, unsigned int numBytes, const char *password)
Return Value: ImageConversion
Technical Notes
1 The memory in inPDFMem must be available until pdf2img_destroy_conversion is called for 
this conversion; it is not copied by PDF2IMG.
2 A document with a User password but no other security restrictions can be processed by providing the 
User password here. If the document has any security restrictions on it beyond simply a User password 
to restrict viewing, you will need to specify its Owner password instead. Opening with an Owner 
password will override the document’s security restrictions, and allow PDF2IMG conversion to 
proceed.
3 It is safe to call pdf2img_new_memconversion_with_password with either a NULL pointer or a 
pointer to zero length string in the password field. In such cases, this call will behave exactly the same 
as its non-password counterpart, pdf2img_new_memconversion.
4 Of the two calls pdf2img_new_conversion_with_password and 
pdf2img_new_memconversion_with_password, one or the other must be called to create an 
image conversion, but not both.
Description
This call creates a PDF-to-Image conversion from a buffer of 
bytes, using the supplied password. Each is local to the thread 
which makes this function call, and should not be shared across 
threads.
Parameters
• const void *inPDFMem: pointer to location of input 
image in memory
• unsigned int numBytes: number of bytes in this buffer
• const char *password: password string for opening the 
PDF document
Return Value
ImageConversion
Exceptions
Header
pdf2imglib.h
Related Methods
pdf2img_destroy_conversion,
pdf2img_new_conversion,
pdf2img_new_conversion_with_password,
pdf2img_new_memconversion
Availability
All platforms
pd f2imgl ib R eferenc e  Ap pendi x       A. 21
5 The password argument is copied to an internal buffer. The client’s copy may be released after this 
call.
If using:
Permission Required
Any output format
Open, Copy
EPS output format
High Quality printing
Color management
Modify
A.22
PDF2IMG User Guide
pdf2img_release_pagemem 
(ImageConversion iC)
Return Value: int
Description
This call releases the memory held by the ImageConversion 
for a graphic converted "into memory" by 
pdf2img_convert_page. This call is required only if 
pdf2img_convert_page was directed to return its output 
in memory instead of to an output file.
Parameters
ImageConversion iC: the data structure containing the 
specifications for the active, current conversion
Return Value
int
Exceptions
Header
pdf2imglib.h
Related Methods
pdf2img_convert_page,
pdf2img_get_pagemem,
pdf2img_get_pagememsize
Availability
All platforms
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