BeginPaint ,End Paint functions

[Guest]

Hi Every Body,

i try to developin C# application in CASIO IT-500 device. TO make image
capture i need BeginPaint EndPaint functions. Anybody has idea how can we
user this functions.

thanks in advance.

 

[Chris Tacke, eMVP]

What would these functions do? Control (and some derivatives) support
overriding OnPaint, so at the top would likely be "begin" and the bottom
"end".

 

[Guest]

hi, i wantto use this functions capture pictures on device camera. now i'm
try to run Evc++ sample application, in the Camera.h

INT CAMSingleCapture( const TCHAR *, INT, INT); // Captures a single image

function is defined, and i try to use this function like this;

CAMSingleCapture(TEXT(\\My Documents\\Picture.jpg),CAM_JPEG,CAM_VGA);

but evc encountered error like below

error C2664: 'CAMSingleCapture' : cannot convert parameter 1 from 'char
[26]' to 'const unsigned short *'

why, why ????

thanks.

 

[Chris Tacke, eMVP]

Well you're missing quotes, that's a start....

 

[Guest]

Hi ,
thank you for help, in weekend i try to implemet come c# code for beginpaint
functions.

public struct PAINTSTRUCT
{

public IntPtr hdc;
public int fErase;
public System.Drawing.Rectangle rcpaint;
public int fRestore;
public int fIncUpdate;
public Byte[] rgbReserved;
};

[DllImport("coredll", EntryPoint="BeginPaint", CharSet=CharSet.Unicode,
CallingConvention=CallingConvention.Winapi,SetLastError=false)]
public extern static IntPtr BeginPaint(IntPtr hwnd, ref PAINTSTRUCT pps);

[DllImport("coredll", EntryPoint="EndPaint", CharSet=CharSet.Unicode,
CallingConvention=CallingConvention.Winapi,SetLastError=false)]
public extern static IntPtr EndPaint(IntPtr hwnd, ref PAINTSTRUCT pps);

but when try this functions in form Paint evet it gives Not
supportedexception.

thanks in advance.

 

[Guest]

AZlright, now I see the function you were trying to call. I think at this
point it's better to ask what you're trying to achieve overall rather than
trying to debug your P/Invoke call. Exactly what behavior are you trying to
achieve? It may be possible without the call.

-Chris